I believe, that’s something which became impossible with Wayland?
But it wasn’t very good under X11 either. Even back then, it was much less clunky to use the various KWin scripts, which offer tiling. Well, and by now Plasma has built-in semi-automatic tiling, which those scripts basically just configure, so they do now feel quite smooth.















Yeah, and you don’t have to know which fork to choose. Only the compatible fork will show up in the search.
(I was going to recommend that, but had something in the back of head, that you needed a manual step to enable the configuration. But I just saw that this is described in the Plasma 5 version, not the Plasma 6 fork, so I guess, it’s not necessary anymore…)