Just a note: there are a few on-screen software keyboards for X out there that aren’t tied to a specific DE, like xvkbd and svkbd. They might be worth trying if you find some distro that works well except that the default on-screen keyboard sucks. (No idea if there’s any equivalent for Wayland.)
The last one is from 2017, alas. The current Gentoo GUI ISO only includes KDE and fluxbox ( full package list, just in case someone’s really bored and wants a look).