So I did figure out that yes, #Mastodon can federate #Lemmy and #Kbin content. The problem is that Mastodon doesn’t know what to do with it, so it (the group) looks like a user that boosts all posts and comments.
I found myself browsing the “federated group” @selfhosted over on https://kbin.social, as I think Kbin has a nicer UX for it.
I didn’t really want to create a separate account for group stuff, but that might be what we do in the short term. 🤔
I think group is to be implemented in Mastodon soon™. Qoto’s fork already did, and some implementations like GNU Social and Frendica had supported such feature since before Mastodon (the software) even existed.
Decades ago on status net one could just write an hashtag with an exclamation mark instead of a hash and it would go to anyone that followed it. It was kinda crazy but also so cool.