I think you are confusing this with U2F support using the secure element, which has been added much earlier (I have also been using it for years already). The d

I think you are confusing this with U2F support using the secure element, which has been added much earlier (I have also been using it for years already). The difference between that and Passkey is that Passkey syncs private keys between Apple devices through iCloud Keychain. The older U2F support is per-device.