How do I get rid of my dead name in iPadOS settings?

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