I’ve had the exact same problem since ios17 beta. Cannot get the developer beta to show up. Just today received an email from support stating they are only there for problems with coding stuff. Strange because i used the support for account related things…. but I have never seen this problem fixed up until now. I read something that someone hat ape check their account and that they corrected something but I never saw any confirmation for that. And given the response I just got from support I doubt it.