Maybe people have gotten Saned for network scanning working on other things than bazzite, but I can't figure it out and the discord is never helpful.

But document signing is a technical limitation caused by flatpak. You can technically do it by installing your entire office and authentication suite on a rooted distrobox, but then that is defeating a fair amount of the point of ease of use and sandboxing. I haven't tested that though so even that might have some bugs or not work.

There are but trackers on different upstream flatpak software for it like Firefox, but it has been completely dead for 5 years with no plans on looking at it.