How to enable four-finger touchpad gestures? - eviltoast

Not sure if it’s okay to ask for support in here, I’m just giving it a try. 🙂

I’m using Manjaro Linux with KDE 5.26, and I thought in this release touchpad gestures should be working out of the box, but I was wrong. In an X11 session, I got three-finger swipe up/down to switch virtual desktops, and in Wayland I just get two fingers for scrolling, everything else doesn’t seem to work.

How can I enable all the touchpad gestures?