GetBiometricLabels.kt

val biometricManager = BiometricManager.from(this)
var result = listOf<String?>()
if (biometricManager.canAuthenticate(BIOMETRIC_STRONG) == BiometricManager.BIOMETRIC_SUCCESS) {
    when {
        Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
            val bioMetricHardwareManager = (applicationContext.getSystemService(Context.BIOMETRIC_SERVICE) as?                             android.hardware.biometrics.BiometricManager)                                                           
            
            bioMetricHardwareManager?.getStrings(Authenticators.BIOMETRIC_WEAK or Authenticators.BIOMETRIC_STRONG)
                ?.run {
                    result = listOf(
                        buttonLabel?.toString(),
                        promptMessage?.toString(),
                        settingName?.toString()
                    )
                }
        }
        else -> {
            // NOT_AVAILABLE_FOR <API 12
        }
    }
}