For example, say an instance C is not defederated with B nor A. Can a user on A see users from B if they visit a community on C? If so, to what extent can the users from A and B interact with each other on C?
For example, say an instance C is not defederated with B nor A. Can a user on A see users from B if they visit a community on C? If so, to what extent can the users from A and B interact with each other on C?
From practical example:
I defederated one instance. Before, I saw content of them, now I dont. I dont know if they can see my content but I dont think they do.
Obviously a sample size of one is not evidence but more of a hint at what might happen.
You can always ask the folks on .ml for they make the software.