Problems with iOS events for user subscriptions

[jondspa]

Describe the bug
I have iOS and Android apps that have subscriptions. Firebase is supposed to automatically collect app_store_subscription_convert and app_store_subscription_renew events. Works fine in Android but zero coming through on iOS.

I did notice last week that my iOS app_id and team were empty in Firebase settings. I filled them and hoped that these events would start appearing. But nothing. Do I need to download a new version of GoogleServices-info.plist and launch a new version of my app?

(I do have lots and lots of other events that are reported correctly in iOS and I can see on Apple's site that I have lots of conversions and renewals.)

To Reproduce
These Firebase automatically collected events are not showing up.

Expected behavior
These events should show up from iOS.

Plugin Version
2.0.5

Smartphone (please complete the following information):

• OS: iOS
• Cordova: 10.0.0
• Cordova-iOS: 6.2.0
• Cordova-android: 9.0.0

Additional context
Anybody having a similar issue with these iOS subscription events? Any advice would be most appreciated!