That icon set definitely needs to add some more icons — for Bonfire and some other Fediverse software.
That icon set was created 2 or 3 years ago — and, is a bit out. But, it is straightforward to correct — the illustrator just needs to create and add more icons 🙂
we have an icon in several formats, but a simplified one that scales well to smaller sizes may be useful as well: https://bonfirenetworks.org/presskit/