#Repology only has marginal support for F-Droid, only seeing a few handpicked packages for software which is also available in Linux:

repology.org/projects/?inrepo=…

I've recently had a few PRs which improve F-Droid support and add #IzzyOnDroid, allowing full-fledged version comparison within Android ecosystem.

I wonder if any #fdroid maintainers or @IzzyOnDroid would be interested in that.