In the last 1 month, Games I have enjoyed on my steam deck:
* A Plague Tale: Innocence
* Shadow tactics: Blades of Shogun
* Metro 2033
* Mark of the Ninja
* A way out (co op only)..
My only recommendation for playing in bed is that get some kind of stand or something so you can rest the deck on your chest/stomach and comfortably play for 2-3 hours at a time.