I have been reading through this and it shows how to use EF core for custom tables but his doesn’t help when you want to use EF Core in a custom package and have it target whatever the user has selected? i.e. I want to target SQLite and MSSQL? This does not cover that situation?
Ignore me. Leaving this here for someone else. Seems you need to use IMigrationProviderSetup and IMigrationProvider