Honestly I'd just be happy enough for them to release it as a flatpak or at the very least as a .deb package. Someone would eventually make a flatpak which will just run it in a sandbox and make it available for every other linux distro independently. Heck, even I would try it as I experience with making flatpaks and can just see the Manifest files of other flatpaks. Can't do anything if there isn't at least one release of OperaGX for Linux though...