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.
I’m a bit confused why it never really caught on. It had so much potential. I loved playing a game while having the map on the little screen for example. Or the inventory or whatever.