I hope you mean touchpad by touch, it has nothing to do with desktops, it relates xinput libinput synaptics sw common for X and wayland, window managers. If it works it does so before desktop layer is drawn, in some cases it can work on console as well with the right sw.

@fschaupp @iturnedintoanewt

Seems the one I use is Maliit. It’s on the chunky side, but for the few times I type without the real keyboard, it does the job just fine I guess.