Threads is officially starting to test ActivityPub integration

"""This test appears to only cover one small part of a truly federated social network — it doesn’t sound like you’ll be able to post from Mastodon to Threads, for instance, and you can’t move your account between services. But the test at least reaffirms Meta’s commitment to ActivityPub and to being part of the broader open social web."""

[dupe]

More earlier here: https://news.ycombinator.com/item?id=38631751