Unable to create a passkey on iOS with biometrics disabled

[kvark85]

Steps to Reproduce:
On an iOS device with biometrics disabled, attempt to create a passkey using the following publicKey options:

{
  "rp": {
    "name": "App name",
    "id": "my_domain.com" // needs to be changed to the real domain name
  },
  "user": {
    "id": "UjVIS0lNM1RNMjZCVkY2NzJGTFE",
    "name": "my_name",
    "displayName": "my_name"
  },
  "challenge": "5BpUi8A2tCj2bRzAnPlZ-Baxh93DG9qICl8Zs6ucDhASudblJxSVRjJX5B1GVEjZ8-2slxitdXLebMDkBon9Ww",
  "pubKeyCredParams": [
    {"type": "public-key", "alg": -7},
    {"type": "public-key", "alg": -8},
    {"type": "public-key", "alg": -36},
    {"type": "public-key", "alg": -37},
    {"type": "public-key", "alg": -38},
    {"type": "public-key", "alg": -39},
    {"type": "public-key", "alg": -257},
    {"type": "public-key", "alg": -258},
    {"type": "public-key", "alg": -259}
  ],
  "timeout": 60000,
  "authenticatorSelection": {
    "requireResidentKey": false,
    "userVerification": "preferred"
  },
  "extensions": {
    "credProps": true
  },
  "attestation": "direct"
}

Expected Behavior:
Passkey should be created successfully using the device passcode (i.e., fallback to passcode-based auth if biometrics are unavailable). This works correctly in a web context when using navigator.credentials.create({ publicKey }).

Actual Behavior:
When using the react-native-passkeys library, passkey creation fails with the following error:

 Error code: ERR_BIOMETRIC; error message: Calling the 'create' function has failed

The WebAuthn documentation states that it’s possible to create a passkey with biometrics disabled by setting:

authenticatorSelection: {
  userVerification: 'preferred'
}

Other services (e.g., Binance) successfully create passkeys even when Face ID is disabled. In such cases, the user is prompted to enter the device passcode instead.

Environment:

• Device: iPhone 13
• iOS version: 18.5
• react-native-passkeys version: 0.3.3
• react-native: 0.76.9 (old architecture)

Question:
Is this a known issue? Are there any workarounds or recommended fixes to enable passkey creation via device passcode when biometrics are unavailable?