Sway is probably meh because it's a manual tiler. I use sway-autotiling in laptop mode and don't bother with switching the layout in tablet mode.

But generally the question should be "How does a stacking window manager even work with touch?" The answer is "like shit". Instead of having your windows automatically placed on the screen, you have to drag them around with your stylus.

I used to use KDE Bismuth (tiler for Plasma) and it was the best experience on a touchscreen I could imagine. I mainly used 2 tiling layouts. The usual Master+Stack for regular use and when watching lectures I used a layout which is almost stacking but makes the windows slightly smaller than full screen, so you can grab the window on the bottom easily. I had a keybind which reduced the opacity of a window making it see-through. That way I could have my lecture over almost the full screen while still being able to write over almost the entire screen.

Plasma also has the option to do something when you drag from a specific screen edge. I used that to launch the app launcher, to select workspaces and lock the screen.