I’m sorting out my collection of native games and ROMs, Pegasus requires some forethought to customize the collections as I want but it seems like the best option. Do you know of interesting and equally customizable alternatives like Pegasus that are not proprietary and are comfy with the gamepad?
It’s hard to reach out from a flatpak’s sandbox to run other programs - for example Steam’s flatpak doesn’t like to “add non-steam games”.
You can use Flatseal for this.