I was about to post in the Model Y forum and found this thread in a search so will chime in to this thread instead.
I, too, started experiencing the symptoms described by others in this thread in my MYLR. i.e. audio quality is worse than my Samsung phone speakers. Started happening after the 2021.36 update for me as well. So far, restarting it with the steering wheel buttons restart fixes it... but not permanent fix. So far, it's happened three times since the update. The third time it happened, I was on a short drive so didn't bother performing the reset. Just locked the car and afer leaving the car for a few hours and coming back, it started working again.