As a gaming mom myself, I’d second the Steamdeck recommendations. I love mine! Best thing I have bought in years honestly.
I can play in the living room, while hanging out with the rest of the family, and I take it with me on work trips as well. I don’t have Valheim on it, but I do have No Man’s Sky and it works well. I’m currently playing Baldur’s Gate 3 on the deck - there are so many great options.