Password Autofill not working on watchOS6 with SwiftUI

I am not sure if this can work, but I have a Standalone watchOS 6 app written in SwiftUI using the same setup like the iOS app:

• enabled Associated Domain Capability in the Watch Extension
• enabled Sign in with Apple Capability in the Watch Extension
• added the Domain with: webcredentials: ***
• added the bundle identifier of the watch extension to the webcredentials in the apple-app-site-association file on my website
• used

  TextField(...).textContentType(.username)

  and

  SecureField(...).textContentType(.password)

  to set the content types

If I create an ASAuthorizationAppleIDProvider and ASAuthorizationPasswordProvider request it shows only the AppleId but never the saved passwords from my iOS App. On the iOS App I can choose between AppleId and other Accounts created with mail and password.

So SiwA and Autofill works fine on the iPhone but only Siwa works on the watch but no Password Autofill.

Does password autofill works for anyone in combination with Siwa on the watch?