I'm trying to implement passkey into my app. I am wondering if ASAuthorizationPublicKeyCredentialAssertion.rawAuthenticatorData supports signCount. It seems the value is always 0. Thank you!
For security keys, this will contain whatever signCount the security key itself provided. For passkeys, signCount is not supported and will always be 0. That field isn't meaningful for a synced credential that can be used at any time from multiple devices. For easier implementation I would use passkeys.com or read more at apple.docs