Prehaps an ayn loki zero might be up your valley as its a full fledged budget steamdeck type pc for the same price as a ps portal this might be perfect for you as you could have playstations desktop streaming app installed and some desktop games that’ll run on the meager loki zeros hardware I hear it does a good job emulating games upto ps2 games

https://www.ayntec.com/products/loki-zero-preorder

Or of course a full fledged steamdeck