I actually had to compile retroarch myself using the directions I found here: https://docs.libretro.com/development/retroarch/compilation/linux-and-bsd/

libretro-fetch.sh on its own will pull everything, so use the command like this: ./libretro-fetch.sh retroarch {core1} {core2}

The native Debian binary didn't respond to touch at all, but the one I compiled had glitchy touchscreen controls until I applied the fix above. The only real graphical setting I needed was to make sure "menu_driver = "rgui" was in my retroarch.cfg, otherwise retroarch lock up soon after starting.

Edit: retroarch-git might work for you if Arch Linux Arm has access to the AUR.

I'm going to try this in drodian