>- Linux comes in finite but vastly more combinations than OSX and Windows which means you are probably going to need to pick something like Ubuntu or struggle with the above

This is easily solvable by distributing the app via a distro agnostic mechanism, like as a Flatpak or AppImage. Using Flatpak also eliminates the need for rolling their own app update mechanism.

AppImage relies on the old, unmaintained and suid root fuse2. Not a wise choice in 2025.