Apple doesn't put the identifier in the Passkey, so when storing multiple ones you don't know which one is related to which Apple ID..
So good luck figuring out which one you need to remove if you need to do a cleanup.
You know you can edit those entries and add an identifier, right?
You can, but you shouldn't have to.
Most services embed the identifier in the enrollment token so it just shows up.
Do you have one (or two), and have you even tried?
I confirm that I can't change it on my Yubikey 5 C NFC, same thing with my Feitian K40. Only select or delete.
Pretty sure the idea is that you only ever have 1 apple ID.
Not possible, I have a personal Apple ID for my own stuff and a business-managed Apple ID for work.
What if you have a backup of your partner’s / child’s / family member’s passkey?
Pretty sure that's also accounted for, by buying multiple keys. Each person gets their own login, key, duplicate key for backup (placed somewhere offsite).
They don't want you backing up someone elses key on your account. Again; the idea being that each person has 1 of these things. If you need a backup Yubi-Key, they want you to be buying a literal duplicate key; not having your 'backups' on someone elses key.
Have you guys learned nothing about not sharing passwords?
I don't understand why apps and services are so obsessed with 'Passkey' or password-less login. I know there's some risk using email & password login method, but the passkey thing is half-baked and it locks users from getting their account back if somehow they forget it, especially Google's passkey approach is totally awful.
This is why you should have a spare key in case you lose your main one and print out your recovery keys.
Mine is on my keychain so if I lose that, I have bigger problems than getting back into my accounts.