I have set my new name everywhere I can in the AppleID settings but the old name is still showing up in this place, and maybe in other places which I haven’t seen yet. But how can I get my chosen name to show up here?
(for clarity, this is the profile picture selection on iPadOS)
Solution: The solution for me was that I had to change my name in the contacts.
More comprehensive solution here
If anyone ever figures this out for your Steam account (not the gamertag, which can be changed), lmk, I’m in a similar boat.