diff --git a/projects/packages/connection/changelog/update-jetpack-package-versions-add-to-sync b/projects/packages/connection/changelog/update-jetpack-package-versions-add-to-sync
new file mode 100644
index 0000000000000..f857ded66fb6d
--- /dev/null
+++ b/projects/packages/connection/changelog/update-jetpack-package-versions-add-to-sync
@@ -0,0 +1,4 @@
+Significance: minor
+Type: changed
+
+Jetpack Connection: Add jetpack_package_versions to Sync
diff --git a/projects/packages/connection/src/class-package-version-tracker.php b/projects/packages/connection/src/class-package-version-tracker.php
index 1e54313a18491..2d1b374336a08 100644
--- a/projects/packages/connection/src/class-package-version-tracker.php
+++ b/projects/packages/connection/src/class-package-version-tracker.php
@@ -85,13 +85,43 @@ public function maybe_update_package_versions() {
 	}
 
 	/**
-	 * Updates the package versions:
+	 * Updates the package versions option.
+	 *
+	 * @param array $package_versions The package versions.
+	 */
+	protected function update_package_versions_option( $package_versions ) {
+		if ( ! $this->is_sync_enabled() ) {
+			$this->update_package_versions_via_remote_request( $package_versions );
+			return;
+		}
+
+		update_option( self::PACKAGE_VERSION_OPTION, $package_versions );
+	}
+
+	/**
+	 * Whether Jetpack Sync is enabled.
+	 *
+	 * @return boolean true if Sync is present and enabled, false otherwise
+	 */
+	protected function is_sync_enabled() {
+		if ( class_exists( 'Automattic\Jetpack\Sync\Settings' ) && \Automattic\Jetpack\Sync\Settings::is_sync_enabled() ) {
+
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Fallback for updating the package versions via a remote request when Sync is not present.
+	 *
+	 * Updates the package versions as follows:
 	 *   - Sends the updated package versions to wpcom.
 	 *   - Updates the 'jetpack_package_versions' option.
 	 *
 	 * @param array $package_versions The package versions.
 	 */
-	protected function update_package_versions_option( $package_versions ) {
+	protected function update_package_versions_via_remote_request( $package_versions ) {
 		$connection = new Manager();
 		if ( ! $connection->is_connected() ) {
 			return;
diff --git a/projects/packages/connection/tests/php/test_package_version_tracker.php b/projects/packages/connection/tests/php/test_package_version_tracker.php
index 8050bb7552b15..c35b126515397 100644
--- a/projects/packages/connection/tests/php/test_package_version_tracker.php
+++ b/projects/packages/connection/tests/php/test_package_version_tracker.php
@@ -54,6 +54,10 @@ public function set_up() {
 	 * @after
 	 */
 	public function tear_down() {
+		global $wp_actions;
+		// Restore `init` in global $wp_actions.
+		$wp_actions['init'] = true;
+
 		$this->http_request_attempted = false;
 		Constants::clear_constants();
 		WorDBless_Options::init()->clear_options();
@@ -237,13 +241,15 @@ public function jetpack_maybe_update_package_versions_data_provider() {
 	}
 
 	/**
-	 * Tests the maybe_update_package_versions method when the HTTP request to WPCOM succeeds.
+	 * Tests the maybe_update_package_versions method with rate limit applied.
 	 */
-	public function test_maybe_update_package_versions_success() {
-		\Jetpack_Options::update_option( 'blog_token', 'asdasd.123123' );
-		\Jetpack_Options::update_option( 'id', 1234 );
+	public function test_maybe_update_package_versions_with_rate_limit() {
+		// Rate limit.
+		set_transient( Package_Version_Tracker::RATE_LIMITER_KEY, time() );
 
-		add_filter( 'pre_http_request', array( $this, 'intercept_http_request_success' ) );
+		$tracker = $this->getMockBuilder( 'Automattic\Jetpack\Connection\Package_Version_Tracker' )
+			->setMethods( array( 'update_package_versions_option' ) )
+			->getMock();
 
 		update_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION, self::PACKAGE_VERSIONS );
 
@@ -254,20 +260,25 @@ function () {
 			}
 		);
 
-		( new Package_Version_Tracker() )->maybe_update_package_versions();
+		$tracker->expects( $this->never() )
+			->method( 'update_package_versions_option' );
 
-		remove_filter( 'pre_http_request', array( $this, 'intercept_http_request_success' ) );
-
-		$this->assertTrue( $this->http_request_attempted );
+		$tracker->maybe_update_package_versions();
 
-		$this->assertSame( self::CHANGED_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
+		$this->assertSame( self::PACKAGE_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
 	}
 
-	/**
-	 * Tests the maybe_update_package_versions method when the site is not connected.
-	 */
-	public function test_maybe_update_package_versions_not_connected() {
-		add_filter( 'pre_http_request', array( $this, 'intercept_http_request_failure' ) );
+		/**
+		 * Tests the maybe_update_package_versions method when the `init` hook is not fired.
+		 */
+	public function test_maybe_update_package_versions_with_init_hook_not_fired() {
+		global $wp_actions;
+		// Remove `init` from global $wp_actions.
+		unset( $wp_actions['init'] );
+
+		$tracker = $this->getMockBuilder( 'Automattic\Jetpack\Connection\Package_Version_Tracker' )
+			->setMethods( array( 'update_package_versions_option' ) )
+			->getMock();
 
 		update_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION, self::PACKAGE_VERSIONS );
 
@@ -278,27 +289,22 @@ function () {
 			}
 		);
 
-		( new Package_Version_Tracker() )->maybe_update_package_versions();
-
-		remove_filter( 'pre_http_request', array( $this, 'intercept_http_request_failure' ) );
+		$tracker->expects( $this->never() )
+			->method( 'update_package_versions_option' );
 
-		$this->assertFalse( $this->http_request_attempted );
+		$tracker->maybe_update_package_versions();
 
 		$this->assertSame( self::PACKAGE_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
-
-		$failed_request_cached = get_transient( Package_Version_Tracker::CACHED_FAILED_REQUEST_KEY );
-
-		$this->assertFalse( $failed_request_cached );
 	}
 
 	/**
-	 * Tests the maybe_update_package_versions method when the HTTP request to WPCOM fails.
+	 * Tests the maybe_update_package_versions method with Sync disabled when the HTTP request to WPCOM succeeds.
 	 */
-	public function test_maybe_update_package_versions_failure() {
+	public function test_maybe_update_package_versions_with_sync_disabled_remote_request_success() {
 		\Jetpack_Options::update_option( 'blog_token', 'asdasd.123123' );
 		\Jetpack_Options::update_option( 'id', 1234 );
 
-		add_filter( 'pre_http_request', array( $this, 'intercept_http_request_failure' ) );
+		add_filter( 'pre_http_request', array( $this, 'intercept_http_request_success' ) );
 
 		update_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION, self::PACKAGE_VERSIONS );
 
@@ -311,28 +317,20 @@ function () {
 
 		( new Package_Version_Tracker() )->maybe_update_package_versions();
 
-		remove_filter( 'pre_http_request', array( $this, 'intercept_http_request_failure' ) );
+		remove_filter( 'pre_http_request', array( $this, 'intercept_http_request_success' ) );
 
 		$this->assertTrue( $this->http_request_attempted );
 
-		$this->assertSame( self::PACKAGE_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
-
-		$failed_request_cached = get_transient( Package_Version_Tracker::CACHED_FAILED_REQUEST_KEY );
-
-		$this->assertNotFalse( $failed_request_cached );
+		$this->assertSame( self::CHANGED_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
 	}
 
 	/**
-	 * Tests the maybe_update_package_versions method with rate limit applied.
+	 * Tests the maybe_update_package_versions method with Sync disabled when the site is not connected.
 	 */
-	public function test_maybe_update_package_versions_with_rate_limit() {
-		\Jetpack_Options::update_option( 'blog_token', 'asdasd.123123' );
-		\Jetpack_Options::update_option( 'id', 1234 );
-
-		add_filter( 'pre_http_request', array( $this, 'intercept_http_request_success' ) );
+	public function test_maybe_update_package_versions_with_sync_disabled_not_connected() {
+		add_filter( 'pre_http_request', array( $this, 'intercept_http_request_failure' ) );
 
 		update_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION, self::PACKAGE_VERSIONS );
-		set_transient( Package_Version_Tracker::RATE_LIMITER_KEY, time() );
 
 		add_filter(
 			'jetpack_package_versions',
@@ -343,25 +341,25 @@ function () {
 
 		( new Package_Version_Tracker() )->maybe_update_package_versions();
 
-		remove_filter( 'pre_http_request', array( $this, 'intercept_http_request_success' ) );
+		remove_filter( 'pre_http_request', array( $this, 'intercept_http_request_failure' ) );
 
 		$this->assertFalse( $this->http_request_attempted );
 
 		$this->assertSame( self::PACKAGE_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
+
+		$failed_request_cached = get_transient( Package_Version_Tracker::CACHED_FAILED_REQUEST_KEY );
+
+		$this->assertFalse( $failed_request_cached );
 	}
 
 	/**
-	 * Tests the maybe_update_package_versions method when the `init` hook is not fired.
+	 * Tests the maybe_update_package_versions method with Sync disabled when the HTTP request to WPCOM fails.
 	 */
-	public function test_maybe_update_package_versions_with_init_hook_not_fired() {
-		global $wp_actions;
-		// Remove `init` from global $wp_actions.
-		unset( $wp_actions['init'] );
-
+	public function test_maybe_update_package_versions_with_sync_disabled_remote_request_failure() {
 		\Jetpack_Options::update_option( 'blog_token', 'asdasd.123123' );
 		\Jetpack_Options::update_option( 'id', 1234 );
 
-		add_filter( 'pre_http_request', array( $this, 'intercept_http_request_success' ) );
+		add_filter( 'pre_http_request', array( $this, 'intercept_http_request_failure' ) );
 
 		update_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION, self::PACKAGE_VERSIONS );
 
@@ -374,11 +372,15 @@ function () {
 
 		( new Package_Version_Tracker() )->maybe_update_package_versions();
 
-		remove_filter( 'pre_http_request', array( $this, 'intercept_http_request_success' ) );
+		remove_filter( 'pre_http_request', array( $this, 'intercept_http_request_failure' ) );
 
-		$this->assertFalse( $this->http_request_attempted );
+		$this->assertTrue( $this->http_request_attempted );
 
 		$this->assertSame( self::PACKAGE_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
+
+		$failed_request_cached = get_transient( Package_Version_Tracker::CACHED_FAILED_REQUEST_KEY );
+
+		$this->assertNotFalse( $failed_request_cached );
 	}
 
 	/**
@@ -410,6 +412,35 @@ function () {
 		$this->assertSame( self::PACKAGE_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
 	}
 
+	/**
+	 * Tests the maybe_update_package_versions method with Sync disabled when the HTTP request to WPCOM succeeds.
+	 */
+	public function test_maybe_update_package_versions_with_sync_enabled() {
+		$tracker = $this->getMockBuilder( 'Automattic\Jetpack\Connection\Package_Version_Tracker' )
+			->setMethods( array( 'update_package_versions_via_remote_request', 'is_sync_enabled' ) )
+			->getMock();
+
+		update_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION, self::PACKAGE_VERSIONS );
+
+		add_filter(
+			'jetpack_package_versions',
+			function () {
+				return self::CHANGED_VERSIONS;
+			}
+		);
+
+		$tracker->expects( $this->once() )
+			->method( 'is_sync_enabled' )
+			->willReturn( true );
+
+		$tracker->expects( $this->never() )
+			->method( 'update_package_versions_via_remote_request' );
+
+		$tracker->maybe_update_package_versions();
+
+		$this->assertSame( self::CHANGED_VERSIONS, get_option( Package_Version_Tracker::PACKAGE_VERSION_OPTION ) );
+	}
+
 	/**
 	 * Intercept the API request sent to WP.com, and mock success response.
 	 *
diff --git a/projects/packages/sync/changelog/update-jetpack-package-versions-add-to-sync b/projects/packages/sync/changelog/update-jetpack-package-versions-add-to-sync
new file mode 100644
index 0000000000000..f857ded66fb6d
--- /dev/null
+++ b/projects/packages/sync/changelog/update-jetpack-package-versions-add-to-sync
@@ -0,0 +1,4 @@
+Significance: minor
+Type: changed
+
+Jetpack Connection: Add jetpack_package_versions to Sync
diff --git a/projects/packages/sync/src/class-data-settings.php b/projects/packages/sync/src/class-data-settings.php
index c2f9288cb5a4e..7ce5e2d2cd412 100644
--- a/projects/packages/sync/src/class-data-settings.php
+++ b/projects/packages/sync/src/class-data-settings.php
@@ -73,6 +73,7 @@ class Data_Settings {
 			 * Connection related options
 			 */
 			'jetpack_connection_active_plugins',
+			'jetpack_package_versions',
 			/**
 			 * Generic site options
 			 */
diff --git a/projects/packages/sync/src/class-defaults.php b/projects/packages/sync/src/class-defaults.php
index 90b6e28240633..69336ca8fdf92 100644
--- a/projects/packages/sync/src/class-defaults.php
+++ b/projects/packages/sync/src/class-defaults.php
@@ -193,6 +193,7 @@ class Defaults {
 		'wpcom_subscription_emails_use_excerpt',
 		'jetpack_verbum_subscription_modal',
 		'jetpack_blocks_disabled',
+		'jetpack_package_versions',
 	);
 
 	/**
diff --git a/projects/packages/sync/tests/php/data-test-data-settings.php b/projects/packages/sync/tests/php/data-test-data-settings.php
index b82fb67cf2584..0803a941871c2 100644
--- a/projects/packages/sync/tests/php/data-test-data-settings.php
+++ b/projects/packages/sync/tests/php/data-test-data-settings.php
@@ -234,6 +234,7 @@ public static function data_test_3() {
 					'jetpack_sync_settings_dedicated_sync_enabled',
 					'jetpack_sync_settings_custom_queue_table_enabled',
 					'jetpack_connection_active_plugins',
+					'jetpack_package_versions',
 					'blog_charset',
 					'blog_public',
 					'blogdescription',
@@ -521,6 +522,7 @@ public static function data_test_7() {
 					'jetpack_sync_settings_dedicated_sync_enabled',
 					'jetpack_sync_settings_custom_queue_table_enabled',
 					'jetpack_connection_active_plugins',
+					'jetpack_package_versions',
 					'blog_charset',
 					'blog_public',
 					'blogdescription',
@@ -573,6 +575,7 @@ public static function data_test_7_1() {
 					'jetpack_sync_settings_dedicated_sync_enabled',
 					'jetpack_sync_settings_custom_queue_table_enabled',
 					'jetpack_connection_active_plugins',
+					'jetpack_package_versions',
 					'blog_charset',
 					'blog_public',
 					'blogdescription',
@@ -628,6 +631,7 @@ public static function data_test_7_2() {
 					'jetpack_sync_settings_dedicated_sync_enabled',
 					'jetpack_sync_settings_custom_queue_table_enabled',
 					'jetpack_connection_active_plugins',
+					'jetpack_package_versions',
 					'blog_charset',
 					'blog_public',
 					'blogdescription',
@@ -863,6 +867,7 @@ public static function data_test_10() {
 					'jetpack_sync_settings_dedicated_sync_enabled',
 					'jetpack_sync_settings_custom_queue_table_enabled',
 					'jetpack_connection_active_plugins',
+					'jetpack_package_versions',
 					'blog_charset',
 					'blog_public',
 					'blogdescription',
diff --git a/projects/plugins/jetpack/changelog/update-jetpack-package-versions-add-to-sync b/projects/plugins/jetpack/changelog/update-jetpack-package-versions-add-to-sync
new file mode 100644
index 0000000000000..f91b639f1e17b
--- /dev/null
+++ b/projects/plugins/jetpack/changelog/update-jetpack-package-versions-add-to-sync
@@ -0,0 +1,5 @@
+Significance: patch
+Type: other
+Comment: Update Sync related unit tests
+
+
diff --git a/projects/plugins/jetpack/tests/php/sync/test_class.jetpack-sync-options.php b/projects/plugins/jetpack/tests/php/sync/test_class.jetpack-sync-options.php
index 4720ea1bb49ae..7c70473302d6f 100644
--- a/projects/plugins/jetpack/tests/php/sync/test_class.jetpack-sync-options.php
+++ b/projects/plugins/jetpack/tests/php/sync/test_class.jetpack-sync-options.php
@@ -245,6 +245,7 @@ public function test_sync_default_options() {
 			'jetpack_verbum_subscription_modal'            => true,
 			'jetpack_blocks_disabled'                      => false,
 			'wpcom_ai_site_prompt'                         => '',
+			'jetpack_package_versions'                     => array(),
 		);
 
 		$theme_mod_key             = 'theme_mods_' . get_option( 'stylesheet' );