I would say react native > kmp > flutter. It's very difficult to hire for flutter there's just not a lot of devs. It works fine but that's a large pain.  Kmp has its own problems but you can train up people fairly easy from a java background which should be common.  React native can be all 3 and typescript should be performant enough for 99% of cases. it does come with its fair share of problems and you may need to delve into native occasionally.

It's been a while since I've done any native mobile development but I've mostly seen a push for RN and MAUI and don't know of many that actively use flutter. It's mostly people that already know C# that push for Xamarin and then MAUI - even though I use C# mostly for back-end I never saw the advantage to that over RN even with old architecture. RN has also come a long way and with Fabric a lot of the bridge induced latency has been reduced - I've read that Flutter can still be more efficient in resource consumption but I can't talk from personal experience. Not to mention with RN you technically can choose from any of the three JS engines based on your use case. It's also the fact that many JS / TS developers just prefer RN since it's easier for them to pick up but you should at least be able to patch or update native modules and know a bit of C++ for Turbo Modules. As far as I know, with Flutter you would need to know Dart and some knowhow of native code when required and that's about the extent of it. That being said I've seen many RN developers that only know JS as these are web devs that have transitioned over. The primary advantage that RN has over Flutter is the large amount of open source support - you can also use most open source pure JS libraries as is and can also use polyfills to use node based libraries as well - never preferred this but the option remains.