Meta announced that users on Threads will be able to see fediverse replies on other posts besides their own. In addition, posts that originated through the Threads API, like those created via third-party apps and scheduling services, will now be syndicated to the fediverse.



Note: You can’t interact with Threads accounts from Lemmy, but you can interact with Threads accounts from MBin (and maybe PieFed), except if your instance is defederated from them obviously
There’s POTUS account for example @potus@threads.net
Why not Lemmy?
Lemmy doesn’t implement Mastodon (which is the fediverse version of Twitter), only their own Lemmy one (Reddit clone). Kbin and Mbin implement both, as does pyfedi/piefed.
Why does Lemmy not interact with Mastodon if the other two can?