Since when was Flutter the "go-to solution for cross-platform development"? Maybe for hobbyists but in the corporate space it's still React Native. The problem with Flutter, and this extends even further with KMP is that the scope of your skills is limited to making mobile apps whereas with React Native you are learning and using skills that can apply to a complete stack. KMP is even worse in this regard as they expe…
I mean, Kotlin on the backend is quite good in my experience, I would say you can definitely run a full stack off of it.