I'm in a position where I can't access my desktop for a few months, and my Steamdeck is absolutely great for lazy couch gaming. It runs pretty much any game I play atm, and with some tweaking per game, the controls are almost always great.

But I also use my Switch from time to time. It's a bit more portable, it's a kind of "just works" device where I don't need to worry about controls or tweaks, and Tears of the Kingdom runs significantly better than it ever did on my Steamdeck, last time I tried.

It sounds like a Switch would be the best option for your use case, if you'd have to pick one. Something the Switch does very well is being able to pause any game by just putting it in standby and not worrying about it. Makes it ideal to play in between doing other stuff.