KDE Plasma handles the touch screen fine on my PineTab2.

It works in LxQt too, but only in portrait mode (which is the default for this device). I keep meaning to look up how to tell it to rotate the touch coordinates along with the display, and I keep not getting around to it.

But the main issue I’ve run into is that most GUI apps for Linux are…let’s just say they’re not designed with touch input in mind.