I’ve been messing with linux on my xps tablet. It mostly works well, I just hate the onscreen keyboards right now. Maliit lacks documentation and modifier buttons, squeekboard doesn’t scale to larger screens unless you manually build a dev branch, and wvkbd doesn’t hide/respond to input boxes.
As for UI, I love plasma mobile personally. For other touch friendly UIs theres: gnome mobile, phosh, and hyprland + gesture plugin.