They have shot down the D&D-adjacent board game suggestions I've made, including HeroQuest, Descent, Gloomhaven, etc.have you considered some board games or maybe CRPG / computer tactical game? Sounds like these would be closer to the requirements
Not sure I know of any TTRPG that meets them (of course there are plenty I do not know…)
I don't really play CRPGs, but my wife has enjoyed Baldur's Gate without me. They can go on raids together if they want.