We are planning to build our Client in Google's Flutter (Dart language) and use Azure B2C for client authentication. But Azure does not provide an SDK for Flutter to pass this first stage, so from that point the client can work with the Azure Serverless services as authenticated client. Please get the Azure AD team to support this new fast growing technology (Flutter), otherwise developers will end up using Firebase as firebase provide full SDK that flutter can use to authenticate itself with Firebase Auth.