littlerack I've been searching everywhere for the last few days and only found 1 issue on GitHub that seemed related which I passed my logs and finding to. This is straight after a fresh install on the latest build, no configuration or changes and in the owner profile. Also happens in safe mode. Ringer, Alarms and Notifications sounds work after booting up until the phone is locked for a few seconds then they stop playing through the internal speakers. Works when connected to an external Bluetooth or USB speaker or headset. It's not hardware because it works after booting initially and on stock android.
Anyway, I didn't want to hijack the post. I just wanted to find out if it was happening on other Pixel 9 Pro XLs.