Flathub apps missing star ratings
I saw this a couple of days ago:
A number of the apps from Flathub are missing stars and aren't sorted according to rating. For example, the Flathub version of the GIMP doesn't appear alongside the version from Fedora. According to @hughsie , this is because the app IDs are different for the Flatpaks, which means that they aren't associated with their ratings.