A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
The authenticator app works but with limited features. So you can extract apk from the original app via apk extractor apps. Then, you can install extracted apk of authenticator app. Of course, it is not corporate solution and the app options which does not work on China is barrier. So, you can start by doing this and asses how the app work on China by testing.