How Do You Add Flat Hub as a community Store to Umbrel OS ?
if FlatHub is not a community Store please added it.
link below show the process
Flat Hub :
Can you tell what do you want to achieve here? If I remember right, Umbrel OS is a server operating system and probably community stores host server application while Flathub serves desktop application.
I think community store would be more suitable for Snaps, because we can pack server apps as Snaps (but if I am not wrong here, Umbrel is built around Docker)