Can you post to multiple Lemmy communities at once from Mastodon?

I recently made a post from here and tagged three communities in it, on three different Lemmy instances, but it only made it to the first one. Is this just how it is suppose to work? And regardless how does this mechanism work? Does it get posted to the first one tagged and then the others deny it? Or was it a synchronicity that my post just didn’t federated to the second two?

[posted to @lemmy]