Moving in-app purchases from one apple id to another

Unless the game developer has a way to do this, it is not possible with Apple.

Click on this link to learn how to contact an app developer - How to contact an app developer - Apple Support

The OP indicated a new account was necessary because the old one was "completely blocked". I presume the account that was blocked was the Apple one, not the email account. In that case it is not possible to change the ID on the old account using the method in the link.

“Properly” changing an AppleID should transition all apps and purchases.

Simply creating a new AppleID and then using it will not.

Change your Apple ID - Apple Support

Understand and agree.

It also was less than clear what “completely blocked” really meant.