Interesting. I'll do what I can to look into it, of course. Thank you. For now, I'm told by others that the normal Linux version works on Linux (I've a friend that hit a similar issue as you)
unfortunately it doesn't seem to. .desktop files seemingly cannot be opened on deck, at least in my experience. x86-64s however, can be. I'm not sure if that can be made to work with RPGM, but it may be worth checking out.