implicit val schema: zio.schema.Schema.Enum3[
        model.Invoice.Unpaid,
        model.Invoice.Paid.Paid1,
        model.Invoice.Paid.Paid2,
        model.Invoice
      ] = DeriveSchema.gen[Invoice]

      implicit val schema: zio.schema.Schema.Enum2[
        model.Invoice.Unpaid,
        model.Invoice.Paid,
        model.Invoice
      ] = DeriveSchema.gen[Invoice]

import zio.schema.Schema
import zio.schema.DeriveSchema

object DeriveEnumSchemaBug extends App {

  object model {

    sealed trait Invoice

    object Invoice {
      final case class Unpaid(id: String) extends Invoice

      object Unpaid {
        implicit val schema: Schema.CaseClass1[String, Unpaid] = DeriveSchema.gen[Unpaid]
      }

      sealed trait Paid extends Invoice

      object Paid {
        final case class Paid1(id: String) extends Paid

        object Paid1 {
          implicit val schema: Schema.CaseClass1[String, Paid1] = DeriveSchema.gen[Paid1]
        }

        final case class Paid2(id: String) extends Paid

        object Paid2 {
          implicit val schema: Schema.CaseClass1[String, Paid2] = DeriveSchema.gen[Paid2]
        }

        implicit val schema: Schema.Enum2[Paid1, Paid2, Paid] = DeriveSchema.gen[Paid]
      }

      /*
when we compile in scala 2.13 we get this:
      implicit val schema: zio.schema.Schema.Enum3[
        model.Invoice.Unpaid,
        model.Invoice.Paid.Paid1,
        model.Invoice.Paid.Paid2,
        model.Invoice
      ] = DeriveSchema.gen[Invoice]

when we compile in scala 3.3.1 we get this - which I think is correct:
      implicit val schema: zio.schema.Schema.Enum2[
        model.Invoice.Unpaid,
        model.Invoice.Paid,
        model.Invoice
      ] = DeriveSchema.gen[Invoice]

       */

      // compiled in scala 2.13
      implicit val schema: zio.schema.Schema.Enum3[
        model.Invoice.Unpaid,
        model.Invoice.Paid.Paid1, // the parent of this leaf node should be present, not the leaf node itself
        model.Invoice.Paid.Paid2, // the parent of this leaf node should be present, not the leaf node itself
        model.Invoice
      ] = DeriveSchema.gen[Invoice]

    }

  }
  println(s"schema ${model.Invoice.schema}")
}