Experience the new One UI 3 with Android 11 for the Galaxy Note20 and Note20 Ultra by becoming part of the Beta Program!
It's always like this, unfortunately. AT&T and Verizon are excluded, but like @SJohnson said, it's those carriers that decide not to participate in the beta. They like to control how OS updates are rolled out too much. I have AT&T and I'm also waiting for the official release from AT&T when they're ready.