Please add Windows Hello support for Gateway authentication. Should be more or less like this: Create a Windows Hello login app - UWP applications | Microsoft Docs
For Fingerprint it’s documented here: Fingerprint biometrics - UWP applications | Microsoft Docs
For Azure MFA SDK see an example here: azure-content/articles/multi-factor-authentication at master · Huachao/azure-content · GitHub (but don’t know if still supported)