How can I check whether WSLg is properly installed?

[codingbutstillalive]

I am using Windows 10 with a WSL2 Ubuntu distro.

I installed Gedit (sudo apt install gedit) and it opens a window as it is supposed to.

But PyQt5 applications do not open graphical windows. They somehow get stuck. No error is shown, but nothing happens.

I haven't updated my graphics card driver to support vGPUs yet. But I don't think that this might be the problem.

I am lacking transparent system logs that show what is the problem in the background. And I don't know how to check if everything is set up correctly.