Created attachment 145306 [details]
X11 settings

SUMMARY

I use "2-finger-scroll" and "edge-scroll" interchangeably in X11. But I cannot in Wayland

STEPS TO REPRODUCE
1. Look at the respective settingspanels in screenshots

OBSERVED RESULT
Exclusive Or enforced by GUI in Wayland.

EXPECTED RESULT
X11 allows free choice.

SOFTWARE/OS VERSIONS

Operating System: Kubuntu 21.10
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
Kernel Version: 5.13.0-23-generic (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-4700MQ CPU @ 2.40GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 4600

ADDITIONAL INFORMATION

My touchpad is fine to support both for years now. 2-finger has the "advantage" of allowing diagonal movement impossible with edge-scroll. But edge-scroll allows for precisely keeping the vertical / horizontal position with pixel perfect precision.

E.g. enlarge a PDF, so the lines stretch the window (especially pages with tiny-print multi-column text). Using 2-Finger, you will find yourself constantly cutting off either the first or the last few letters, because you inadvertently mixed a horizontal scroll-step in there. This is the perfect scenario for edge-scroll.

E.g. open a map and follow a diagonal road off screen. This is perfect of two-finger-scroll, as with edge-scroll you need to alternate between horizontal and vertical portions of the way.