Installing the OpenRGB flatpak leaves out a particular key file installation, rendering the application pretty much useless.
The issue is known to the OpenRGB developer; they even have instructions for how to fix it by installing the missing file on their gitlab page: here and here. Therefore, I assume it isn’t solvable from their end? Unless they somehow added a feature that installs the missing file if it detects it isn’t present.
Is there anything that can be done about this from the Flathub end? It’s a rather annoying issue to need to fix.
Looks like OpenRGB was added about six months ago: OpenRGB Flatpak Request