Help on updating a specific flatpak repo

I hope this is the right place to ask about this, and my apologizes if it isn’t!

So an open source game community I’m part of has a flatpak repo, but the problem is that the flatpak’s original maintainer isn’t active anymore and nobody in the project has the knowledge to update it. It doesn’t work at all anymore. This is the repository that needs to be updated.

I’d like to update it to work, but issue is that I have not tried to set up flatpak repos before and have no idea how to begin when it comes to maintaining what exists already. Anyone know where I should start when it comes to maintaining a pak?

It’s not the right place.

This package isn’t on flathub.