In the Apple ecosystem, passkeys are stored in your iCloud, and access to the passkeys is device bound. So if I generate a passkey on a MacBook, I can then use it from my iPhone as well, because it's encrypted to all my hardware devices.
Replace the word passkey with password in your comment. What’s the benefit of passkeys again?
If you’re not storing the actual private key in the Secure Enclave but only the “access to it” what’s changed from how Apple’s keychain already manages password syncing to iCloud?
The only benefit (and it’s still a decent one) is that some random website breach can’t disclose your private key.
Replace the word passkey with password in your comment. What’s the benefit of passkeys again?
If you’re not storing the actual private key in the Secure Enclave but only the “access to it” what’s changed from how Apple’s keychain already manages password syncing to iCloud?
The only benefit (and it’s still a decent one) is that some random website breach can’t disclose your private key.