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?
So, IIUC, you’re saying that if a user on A browses a community on C, they will never see a user from B?
for content that was not federated prior to defederation, yes.