Looks nice but still a bit sad that Flutter is used instead of something native given that they don't need the app to be cross-platform. Well, even Microsoft uses React Native for a lot of Windows-only apps.
Thus React Native is the only alternative left those teams had to have some kind of nice GUI design experience alongside C++/WinRT, when using WinAppSDK, think Qt with QML/C++.
Agree on the Flutter comment.