I've had my 2022 S for just about 3 weeks now, and the SXM app keeps disappearing and reappearing. The car updated to 2022..12.1 a couple of days ago, and the problem is still happening. I've not enabled the beta software updates yet.
I was starting to wonder if this might be a physical problem - a loose connection or something that is causing the SXM piece to be seen/not seen intermittently. No idea if this is even plausible though. I likely will go ahead and put a ticket in with Tesla on this soon.