Apple id invalid or not supported
I have made a new Apple ID because my old one stopped working after an update a few years ago, it still has the e mail addy I used under my name in the settings, but I cannot access the ID's password even after going to Forgot Password, it continues to say Apple ID is invalid or not supported, I am trying to get to buy a new phone and it will not allow me or the AT&T tech to access the feature to wipe all my previous information off the phone, Apple support could not help after sending it up a couple of supervisors during a call to Apple tech support
iPhone 8 Plus, iOS 15