[hahn-kev]

Man QML is awesome, it's all native UI, and since it's not a browser it has a much simper runtime available for the js that you write.

[b1temy]

Slint may be of interest to you, which is similar but is allegedly better in some ways. It was also made by former Qt team devs.

http://slint.dev/

[pjmlp]

And for those paying for Qt, there is a compiler that partially generates C++ code out of QML.

https://doc.qt.io/qt-6/qtqml-qml-script-compiler.html