Why don’t I have purchases from my account in App Store

See if this support guide can help you:

If you don't see your family's shared content - Apple Support

Regards

Giulio

Purchases are permanently tied to the Apple ID that was used to download/install them.

If, opening AppStore, tapping on your profile/picture (top-right) then tapping on "Purchase" you don't see anything, then you need to re-download apps, music and so on using your new Apple ID.

Regards

Giulio