Apple Security Keys for Apple ID Starting with iOS 16.3 & iPadOS 16.3 comes support for Security Keys for Apple ID, the gist is you will need two keys to get started. Weirdly my one key was
YubiKey Killing passwords with YubiKey and Microsoft Enabling passwordless sign-in on your Microsoft Account(MSA) or Azure Active Directory(AAD) account. Understanding FIDO2 and how Yubico's Security Key(YubiKey) and Windows Hello tie into the process.
