This app demonstrates a full end-to-end passkey implementation in Android, using Jetpack Credential Manager and Compose.
For the server side implementation, see https://github.com/tdcolvin/PasskeyAuthDemoServer.
It authenticates to a demo server I've set up: auth.tomcolvin.co.uk.
Please open an issue if you hit any problems. And if you need help implementing passkeys in your own app (or anything else Android-y) then I'm available as a freelancer 😁. Contact me on LinkedIn or Bluesky.