@Bryan @_elena @[email protected] not that I can tell. I don't see Fediverse-posted non-replies that mention my Threads handle, on the Threads side, right now. I can see a reply to a Threads post from the Fediverse, but not in my notifications. That is, https://www.threads.net/activity/replies only shows Threads-originated replies. I can only see Fediverse-originated replies in a separate section attached to an individual post.
This may just be a step in time thing, I have no way of knowing for certain.