This is update received from Microsoft backend team, currently they don’t have plan to provide an official MSAL React Native library.
If the app is not going to be used in production, you can use the POC library here: https://github.com/AzureAD/microsoft-authentication-library-for-js/packages/292089 (This library is a bit old)
If it’s going to be used in production, you can choose from below compatible libraries:
Note: Microsoft does not provide support on above compatible libraries. If you run into any issues or need help, please post your requests in communities (like Github issues, or Stackoverflow, etc) and seek for help.