Posting my own update. Running build number UP1A.231105.003.2023111500
and I got the no valid OS error again after rebooting. I brought a portable charger with me hoping it would help boot up my phone but I could only get it to display the battery level percentage. I needed to go back home to connect via laptop in order to get the pixel 7 to boot again.
Does anyone know of any updates to get this bug fixed?