Force metadata update after installing new flatpak ref through gnome-software
gnome-software-3.35.91-2.fc32.x86_64
1.Have a fresh install of Fedora without Flathub
2.go to https://flatpak.org/setup/Fedora/
3.Click on Flathub repository file
4.Install Flathub via gnome-software
5.Once it is installed, go back and seach for some flatpaks
Result:
flatpaks from Flathub are not available until user kill gnome-software and force the metadata update