Greetings TheMatts07YT!
Since Wolfpack already has Steam-Workshop support, i don't think jsgme will ever be needed. However, i'm pretty confident, that it is only a matter of time until the first bigger mods will appear on Steam. So far the community has created the most amazing things for every other big subsim game and Wolfpack will surely be no exception. The game just needs to be closer to beeing finished.