I have an injury and I want to lay down flat while im playing, I can mount the handheld on bed stand but how should I play relaxed? I think normal controller will still stress your upper back (read the body text and you will understand)

I have an injury and I want to lay down flat while im playing, so nintendo switch 2 I can mount it on bed stand and take the joycons off and play relaxed without stressing my shoulders and elbows, but tbh I like more steam library and its more cheap.. so is there any solution with steam deck to not hold it? And I dont like use a normal controller because it will make your shoulders tired even if you are laying down.. so help me guys