[zimpenfish]

> governments could ask, I request that you copy over the private keys for these individuals

I don't believe that's possible because the secret key for Keychain lives in the Secure Enclave and is never exposed outside of that processor[1].

[1] https://developer.apple.com/documentation/security/certifica...

[aborsy]

Details are yet to be seen, but note:

>> Once created, the passkey can be stored in iCloud’s Keychain and synced across multiple devices—meaning your passkeys will be available on your iPad and MacBook without any extra work.

So apparently you can transfer a passkey from device to device through cloud.