The touchscreen section stated :

Does not work out of the box with xf86-input-evdev, the default behavior receives screen gestures as clicks, and registers scrolls as marking text. It is not yet clear whether xinput can emulate scrolling with evdev touch events at all [1].

This actually is a kde bug ... See this link

—This unsigned comment is by RaK (talk) 20:45, 2 February 2021 (UTC). Please sign your posts with ~~~~!