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. 🤔
@ThorrJo @selfhosted I suspect its a fluke this works at all 😆. ActivityPub objects are all kind-of the same, and it’s on the developer to decide how to use them. “Reddiverse” (?) software organizes posts into threads, and microblogers sort them into streams.