Normally, you'd be right, but this special filesystem doesn't care about that. I've done similar with different gadgets so many times, always with relativr symlinks, sometimes directly from the root of the special filesystem, sometimes from the gadgets own subdirectory, and it just works.
I mean, SUSE Linux Enterprise, the distro on which OpenSUSE Leap is based, has been developed by SUSE since 2000. It's newest version, 15, is used in IBM's Watson and HP's Frontier supercomputers. I'd say it's enterprise ready.
I use it on my PC and it's installed from the distro repositories, but I found instructions for the flatpak version. Apparently some daemon needs to be installed from the repositories.
Idk about the controllers, maybe there is a utility to configure those out there somewhere, but as far as the Logitech mouse is concerned, there is Piper. Works perfectly on my G502.
Normally, you'd be right, but this special filesystem doesn't care about that. I've done similar with different gadgets so many times, always with relativr symlinks, sometimes directly from the root of the special filesystem, sometimes from the gadgets own subdirectory, and it just works.