Passkeys, the marketing term for WebAuthn’s discoverable credentials feature. Or whatever they’re calling it now (it’s changed at least once or twice in the spec). https://passkeys.dev/docs/reference/specs/

Passkeys are very different from scanning your face and doing facial recognition. It uses local device capabilities like Windows Hello, Face ID etc to hold an elliptical private key securely on a security chip then sign a challenge given by the server. It’s basically LNURL, but better (cross device goes over Bluetooth instead of internet). Both are pretty awesome tho!!