I used the Sunshine game streaming software and the WiiU homebrew port of Moonlight to get game streaming working on a WiiU gamepad. It’s sort of like a bootleg Steam Deck, and it works surprisingly well, but it mostly just made me want a Steam Deck.
That’s awesome love creative setups like this. I’ve been experimenting with a few streaming tools too, and it’s wild how much you can do with older hardware. If you’re into portable entertainment setups, you should also check out CloudStream APK it’s great for streaming media smoothly without the bloat.