The gestures are there in KDE already https://github.com/NayamAmarshe/ToucheggKDE

Touchegg kinda sucks (gestures are not 1:1 but rather just "triggered"), and you also don't need it. KDE and Gnome (as well as some WMs like Niri) have native touchpad gesture support on Wayland. Using my touchpad for history navigation also works flawlessly on Firefox with two fingers (essentially just horizontal scrolling).

I’m sure they manage to hit 120fps smoothly too just like MacOS? …