After reading the "issues" discussion from w weeks ago, this is just an idea at this point. The simplemobiletools fork was a mock up for something that sounds like its very much in the planning/ideas stage. you can also go to fossify.org to see another mock up that does nothing right now. You could message one of them, but I think maybe its some MIT software team / group & their just tossing ideas around for a foss hub of sorts.

While there aren't any new releases at this point, you could use Obtanium and point it to the repos for the apps you use. That way, you'd get notified once the releases start and you'd get them right from the developers.

Were you on the discussion on GitHub by chance? https://github.com/orgs/FossifyOrg/discussions/9