I know C++ has its warts, but almost every mobile project I've worked on has been C++ with a thin layer of objective c and java interop. IMO it's really not worth it to get so tied up in a single companies tooling even if the developer experience is superficially nicer. C++ has all sorts of awful, but it's familiar awful with mature tooling.
Admittedly the things I've worked on has been games and CAD systems so the internal data models and simulation are a lot more complicated than the UI, but I think that holds for a lot of apps.
The vast majority of apps are UI, CRUD, business logic and other things where native code (as in compiled C/C++) is just overkill and makes things more complicated. The few exceptions seem to be the fields you listed.
Admittedly the things I've worked on has been games and CAD systems so the internal data models and simulation are a lot more complicated than the UI, but I think that holds for a lot of apps.