I was on the beta on the Note 20 ultra and I got a notification today that I can update to the official android 12 update. So I tried it and now I'm on the official one ui 4.0 android 12 on my note 20 ultra.
I am also waiting to receive it in my N20 Ultra 5G. I think, from what I've read on here so far, that the first ones to receive it are the users that were enrolled in the Beta programme.