I have a few to consider! This is a great showcase for the modulatirty of the platofrm. 📣
Owncast - live streaming media.
Lemmy and kBin could have some unique components to their display. Yes, it's just text + links/media. But Upvotes/Downvotes are unique. The same format would apply to the replies as well.
Third, many other fediverse clients offer emoji reactions (Akkoma, Misskey, Firefish, even Mastodon shows them for Admin posts), and if that platform does have them, it would be nice to at least have them viewable in Bonfire, even if Bonfire doesn't support reacting with them. The iOS client FediText is trying this out right now.
Finally, this work is interesting - a live audio stream for mastodon. I guess it might appear the same as Owncast or Castopod, maybe.