As for the fn (function) key, i haven’t found a way to reassign or customize it, but so far, i haven’t needed it Set up a recovery key. If you don’t use features like dictation or emoji shortcuts, you probably won’t miss it either.
The automated call system continues If you lose all of your trusted devices and security keys, you could be locked out of your account permanently. the information below is based on apple's support article It may ask you to press a key again
To fix it do this Change the option from banner to full screen Account recovery is typically used in the following common scenarios No access to trusted phone number or changed number
Is this a new phone, or a previously owned phone that is new to you If it was previously owned the only one who has the recovery key is the previous owner Without it the phone will be unusable Is it asking for your recovery key
However, when you generate a recovery key, you can't use account recovery. Do you really mean a security key Or do you mean a recovery key