do you mean like one of these?
https://www.goretroid.com/en-ca/collections/retro-game-system/products/retroid-pocket-flip-2
Or more like one of these..: https://www.goretroid.com/en-ca/collections/retro-game-system/products/retroid-pocket-6-handheld
...plus one of these..? https://www.goretroid.com/en-ca/products/retroid-dual-screen-add-on