Qt for Python (PySide/Shiboken)

I tried the branch for Qt6 == 6.3.1, which is supplied with the OS I have. I did follow https://doc.qt.io/qtforpython/gettingstarted-linux.html, including git clone https://code.qt.io/pyside/pyside-setup. If you have fixed that, then never mind the other problem I've faced. The wheels work, and that's almost all I require. Unfortunately for me, there is an issue in Qt6 (both 6.3 and 6.4, never tested 6.2) itself, but that's another story.