If your FIDO Key gots locked, because the fingerprint was not OK, then its quite easy to unlock the Yubikey FIDO BIO USB Key (if you know it!)
For me, only reset was possible over GUI with yubikey-manager, so the unlock requires shell command!
Install the yubikey-manager package:
transactional-update pkg install yubikey-manager
Unlock the PIN by following shell "verifiy-pin" command:
ykman fido access verify-pin
After entering the correct pin, your Yubikey will be unlocked!
Hint: Unlock the Key over PIN will also work, if you are able to use Google Chrome for your Yubikey BIO Fido Fingerprint Management!
Please note: I recommend to use more than one different fingerprints, because its happen more then one times for me that the Yubikey gots locked. Dont loose your Pin(!) - after wrong pin entrys your Access to the Yubikey will be lost/broken, so you require to reset the yubikey and all accounts!