I still have not figured outthe game-launcher "Athenaeum." I can't get any of thegames installed with that to update. Is there a separateupdater inside the game-launcher ? Maybe they are upto date, but Gnome Software does not think so. TryHitori for example, since it is so tiny, and you might beable to verify my issue. I have not yet check in terminalto see if the version number matches what Gnome Softwareis claiming.
Athenaeum uses flatpak as its packaging system and pulls all data from flathub currently.