Is there a such thing as indirect federation?

https://lemmy.world/post/1300051

Is there a such thing as indirect federation? - LemmyWorld

I’ll explain with an example - there are 3 Lemmy instances A, B, C A federates with B but not C B Federates with both A and C Does A indirectly get the content from C due to B’s federation with it?

If I have understood it correctly then A should only get content from B because they are directly linked. Content from C will display on B (via ‘all’) but will not be sent over from C. Else A would never be able to block C.