Should also add libxcb-cursor0 as the dependency for the Qt6.50

[Seekerzero]

I think libxcb-cursor0 should be one dependency required for running Qt lib, otherwise it will report:

qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: vkkhrdisplay, wayland, wayland-egl, eglfs, offscreen, xcb, vnc, minimalegl, minimal, linuxfb.

The code for installation is:
sudo apt install libxcb-cursor0

[pengsongyou]

Thanks for the info!