I suggest changing your iCloud password and enabling 2-factor authentication if you haven't already. But DO NOT click the notification to do this. Go to Apple's website to do it. (Also, don't trust anyone on the internet to give you a good link. Check your URL bar to make sure you are at appleid.apple.com when you click even my link.)
Also, go to System ...
After 4 days, I would ask them to send it to Apple or return it. Sounds like their ability to explain service delays is lacking. Unless they explained you a path and you didn’t OK them to erase it / begin the unlocking - then it’s on you.
No. However, you can set up a second admin account.
Any admin user/password can be used to authenticate graphically so you could do something insecure like make an account user and password with me/me.
Shift tab, change your name to me, then tab and enter me again for the password and press enter.
What I’m doing is using fingerprint or devices like yubikey ...
Have you tried this method? From this source:
Use Recovery Mode to reset your password
You'll need to boot your Mac into Recovery Mode in order to access the
password reset tool. I've found the easiest way to do that is to turn
off your Mac.
With your Mac turned off, press and hold the Command and R keys on
your keyboard, then press the power button. Hold ...