This morning (March 21), here in Italy on @Threads the option for #Fediversesharing appeared for a while. After a few minutes of "spinning wheel" spinning, she disappeared.

We don't know if it's proof (it went wrong) or mistakes, but this lack of option, for us European users, is now very boring.
The gap should really be bridged with American users, who can choose whether or not to share on Fediverse. We can't choose anything yet.