I I've been playing Trails From Zero in Heroic from GOG and found that while I can do all the STeam Input stuff I want on my Steam Deck, I can't use STeam Input at all on my desktop despite them both being added to Steam the same way and both being the flatpak version of Heroic. They're also both using the same version of Proton.
Really confused here, would it be because of Gamescope? If so, how can I enable it on the Steam shortcut without breaking the existing launch option command?