Threads Enables Fediverse Sharing (Beta) in the US
From Meta:
To see if you have the option, tap your profile icon in the bottom right of the Treads app > double lines in the top right > Account > and it should appear under “Deactivate or delete profile.”
The option is currently greyed out for me, but this is an exciting step, meaning your posts from Threads and/or Mastodon can appear across the fediverse. Long-term, your interactions and replies will also appear everywhere.