Only purchases made before the migration will return to the secondary Apple account — those initially made with that account.

Apple published a support document explaining how to migrate purchases from one Apple Account to another for users everywhere ...

Apple posted a new support document about migrating purchases between accounts, something that Apple users with long online ...

Apple will now allow users to migrate their digital purchases between their primary and secondary Apple accounts in music, ...

Tap Redeem Gift Card or Code. Under the iTunes Pass, tap Get Started. Enter your Apple ID/Apple Account password, then tap OK ...