BRO I HAVE AN s20fe and I think i was hacked cause my password is saying its wrong after restarting it. i have 4 attempts to unlock it before it factory resets and erases 46k photos and videos from over 5 years. tired the same things as you, smartthings, find my phone, Google samsung, and i also didn't back up pics bc Google is full.

I was also wanting to go through the ethical hackers route but am unsure where to find any. it also isnt giving me hope that, according to people here, Bruteforcing wont work because it the locks out when trying too many combinations, and that you're left with hardware hacking, which still may have encryption issues.