Comment # 2 on bug 1012272 from Bo Simonsen

LEAP 15 is suffering from the bug as well. The extension "flatpakref" is not
recognized to be opened with gnome-software. If you do a "zypper install
flatpak" and run "gnome-software
--local-filename=someflatpakreffile.flatpakref" it installs perfectly. Would
really improve usability of LEAP if flatpak was supported via gnome-software.