Function: getSupportedBiometryType()
getSupportedBiometryType():
Promise<null|BIOMETRY_TYPE>
Gets the type of biometric authentication supported by the device.
Returns
Promise<null | BIOMETRY_TYPE>
Resolves to a BIOMETRY_TYPE when supported, otherwise null.
Example
const biometryType = await Keychain.getSupportedBiometryType();
console.log('Supported Biometry Type:', biometryType);