Me and my wife love playing a game called “Out of Space” it’s essentially a procedurally generated clean the house game. It has Overcooked vibes but it’s a lot more chill.
Factorio might be a bit heavy for someone who hasn’t played anything, but the peaceful mode might be interesting for just building. Also depending on what else she likes Cities Skylines, Rimworld, Stellaris or Parkitect are all very management focused.
If you give us more info on what she likes we might be able to give better suggestions.