Apple recently added a new feature that allows you to Apple You can assign a physical security key to your ID for two-factor authentication. To learn how, iPhone add security key to Apple ID, so just proceed as follows:
- First, go to the app on your iPhone Settings.
- Once you've done that, tap on at the top line with your profile.
- Then locate and click on the box Password and security.
- Here then tap on the option Add security keys.
- Then it will start add key wizard to walk through.
In order to add a security key, it must meet FIDO certification, for example YubiKey keys and others. To add a key to Apple You need two IDs in case you lose one of the keys.