Apple's passkeys page at - https://developer.apple.com/passkeys/ now says -
Passkeys can now be synced using external providers
What is that supposed to mean and how it can be implemented? Are there any APIs provided by the iOS SDK for the same?
How can passkeys be synced using external providers?
New in iOS 17 and macOS Sonoma, we have added API to allow for third party passkey managers. This in addition to our existing API for third party password managers. The documentation can be found here.