Comment by SylvieLorxu

Might be worth noting that several devs have suggested users use IzzyOnDroid instead. Due to IzzyOnDroid distributing official upstream builds (after scanning), they're not dependent on any build server.

Although they do have build servers for the purpose of confirming upstream APKs match the source code using reproducible builds, but those are separate processes that don't block each other (unlike F-Droid's rather monolithic structure).

IzzyOnDroid has been faster with updates than F-Droid for years, releasing app updates within 24 hours for most cases.