If not, maybe chime in. That’s being led by the official Ff Android lead @ Mozilla, so maybe you won’t have to host this yourself anymore.
Until then, I do get updates, but the repo still seems to have some structural issues, e.g., I don’t see any versions under any of the Ff apps (indeed, when I try to do so, F-Droid crashes!) & also receive same error as @spaetz above.