Got and installed the update last night. This morning, the mobile key would neither wake nor auto-unlock the car, nor let me unlock it by pushing the door handle. I used the key card, which worked flawlessly. Got in. Followed my usual post-update procedure, and did a logo reset. Had to enter my driver pin. Then deleted and re-paired my aOS mobile key, after which (as a practice) I also deleted and re-paired my Pixel 7 phone. Everything is working great now, including the neat new features, and SSP sounds really good... to me at least, but I'm no audiophile.
I only outline these steps because it is a fairly common procedure that I have to follow after an update. I don't know if it's only an aOS issue, or if iOS users sometimes have to do it too, but in the hopes the information is helpful...