I had originally written this after WWDC 2022, and the incredibly low amount of news coverage shocked me enough into researching first-hand the future of passwordless sign-in that Apple/Google/Microsoft want us all to be in.
Nothing has changed in iOS 16 or macOS 13 since WWDC 2022 to suggest that users will have the ability to export their private keys. Passkeys are still a lock-in feature.
Passkeys was not mentioned during the iPhone 14 Event.
I don't have an Android device with Android 11+ to be able to test this, so if any users are able to test out [WebAuthn](https://webauthn.me/) and check if the created passkey via Google's password/passkey manager allows for exporting, it would really be appreciated.
Perhaps this changes with user backlash once enough websites support WebAuthn, but I doubt it.