I've been working on using KMM in Flutter. The library, Klutter, is now available and I recently published a tutorial about it. I'm personally very excited about using KMM with Flutter! Would love to get some feedback because I've been working on it on my own. If you have ideas, improvements, etc, don't hesitate to message me! I would really appreciate it.
https://medium.com/@jjgbuijs/flutter-battery-app-made-with-klutter-74d47002efb1