Does Plasma run on Wayland?
I’m pretty sure touchpad gestures (admittedly not as extensive as MacOS or elementary) is a “native” thing in Wayland - and independant of the DE - i.e. I can’t do gestures in Gnome 3.x because I’m running it on X11… But I could be wrong 'cause I’m not a KDA / Plasma guy… I keep meaning to try it out again one of these days but never get around to it - was impressed the couple of times I got my feet wet in a VirtualBox VM, but not quite ready to jumpship from my current environments, as I need them for work…