I just started my bot @LesbianHexbearSupercharger@hexbear.net; and it's begun subscribing to a ridiculous amount of communities. This is important because in order for a federated community to appear in the all page one member of the local instance must subscribe to that community. Some new communities I can already see are /c/UnixPorn and /c/SelfHost. Posts might take a while to populate, though, as these are new communities Hexbear hasn't yet seen

Thanks to @Char@mander.xyz for the advice in this thread.

Please note, hornyposters, that I've disabled subscribing to NSFW communities.