Proof

react-native-biometrics

real upstream package, not intercepted. native side via the ReactNativeBiometrics module (native-seams/react-native-biometrics.ts) following ios/ReactNativeBiometrics.m as the iOS Simulator answers it: Face ID with no enrolled identity, a passcode set, and a software RSA key that signs without a prompt

90%

API coverage

No visual proof cases have been published for this package yet. The registry summary below describes what the compat layer implements.

Working (6)

isSensorAvailable (LAError -7 for biometrics, FaceID with device credentials)createKeys with an spki public keycreateSignature (RSA PKCS#1 v1.5 SHA-256)biometricKeysExistdeleteKeyssimplePrompt rejecting biometric_error

Missing (2)

the system passcode sheet for allowDeviceCredentials promptswhich settle as the sheet close button does