@DarkSky And... I installed PySide6 on WSL2, but it doesn't run there either, missing libxkbcommon.so.0, which BTW https://www.x.org/releases/individual/lib/ does not have listed.

hello man so first change ur build configuration to release or whatever then build your application and after that go to ur qt files -> bin > compiler u used > windeployqt.exe that file is what which will gather the .dll and etc files which ur app needs right click on the window and select powershell and then this command .\windeployqt.exe "path of ur .exe file"