Worth knowing: Private toots will NOT federate, as long as you don't mention an account on another instance. Also a warning will be displayed if will federate to another instance.
IF it federates to another instance, ALL who follow both you and the mentiones account can see the toot.
That, however, does NOT mean your toot is no longer private. It will only *federate* with a mentioned instance. Think of it as a copy on that instance.
@TQ So does that mean if I post something only for my followers it will only reach my followers that are on the same instance as I am?
So is there a way to post something for followers only (including those on other instances) without it being public there?
Or am I misunderstanding something?