Can somebody PLEASE put that announcement into layman’s english and tell us how we can determine if we do (or do not) need to do something ?
I have no $#%#$% idea what a FIDO U2F key even is let alone what the setup instructions are trying to tell us to do.
FWIW - I’m a premium user setup currently with an authenticator app and multiple yubikey 4 and 5NFC physical keys. No passkeys. I get prompted to insert a yubikey and press the button on it. Simple. Do I have to do anything at all ?