The tool I used for it is called the Retrode2, a cartridge dumper which doubles as a 2 SNES and 2 Genesis controller hub.
With a bit of patience you can even run SNES carts on a Steam Deck https://mastodon.social/@16bitvirtual/116479936082268893
Is it cheap? Nope
Is it sensible? Absolutely not,
Was it fun? 100%
Lesser grade but similar emulation thing that surprised me:
Play a DS or 3DS rom.
Set up the dual screen config.
Second screen is a map or inventory or drawing area?
Just poke the screen.
At least the OLED Deck: yep, its all a touchscreen.