Thank you so much, debular! You are right. I reverted from PHP8.3 back to 8.2 and our site started working again, with all plugins active.
Can you share any more about why this may have occurred and how I can avoid this in the future? Am I cursed to have to stay on 8.2 forever?
Also, now that we believe this is a PHP problem, is there anywhere I can turn for support? I will try Bluehost again but they are not very helpful.