From Reddit. Worked for me.
For anyone who is still struggling with this as I was. I was able to get access to the developer betas by going to settings —> search “beta” —> select Beta Updates —> sign out and then back in on that page to my apple account
For me that worked to immediately allow me to enable access to the betas when nothing else would, even signing out/in of my apple account elsewhere. Now I’m successfully on OS2 beta.
Nwaldman
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
User for