I loathe gnome, so whenever I recommend "Ubuntu" I always specify Kubuntu for that reason.
The average joe has no idea what "desktop environment" means and will not understand how you can just swap DE's even. So starting them off with Kubuntu specifically is ideal IMO.
Ubuntu is fine for grandma, or even Mint, but someone born in the last 40 years will probably appreciate Plasma more.
If you're really wanting to use "Ubuntu" but don't want any of the standard options then PopOS is fine from my experience.