Yes I am aware of the alternatives. Still having used a ton of UI libraries (Unity/Unreal/Godot/C#/QtWidgets/Flutter and web development) I would still choose QML by a landslide. My project ScreenPlay [1] (Cross plattform animated wallpaper and desktop widgets) is written 100% in QML and C++. I use the build in Material Design on desktop which works really nice with fancy animations. At work I develop a cross platform Qt app for desktop and Android tablets. With QtCreator 4.11 they unified the apk creation for all arch and arm versions.
When distributing qt on android you can simply write an guide on how to decompile the apk, replace the qt .so and compile it again. I haven't done it yet so I'm not 100% sure about this. Also you could simply install ministro for this. https://doc.qt.io/qtcreator/creator-deploying-android.html
I had so many linking issues because of the Qt so on Android that I finally had to statically compile the run some tests at all, and in consequence to replace Qt with something else to avoid royalties. The problem of "DLL hell" (i.e. symbol conflicts between library versions) is well known on Android.
