User123456
User123456 I'm facing a similar issue.
Installed gOS successfully on pixel 8
Then clicked update.
Downloaded few apps from fdroid like telegram and Firefox browser.
Before I could install the apps the system notification asked me to reboot. Clicked reboot and the phone said restarting but then went black.
I've tried power button for short intervals, holding for 1 minute, no luck.
Phone was fully charged and to be safe has been put on charger again for few hours. No sign of life.
Would love to know if you got it fixed and how.