Darkscribes Community

In principle that sounds like a problem with NodeBB or other platforms you are using. Lemmy doesnt do anything special to fetch remote communities. But if you notice any error responses served by Lemmy you can open an issue.

What exactly do you mean with parallel federation and queues backed up? There is such a feature but only a single case that requires it, which is federation from lemmy.world to aussie.zone. NodeBB wont be affected by that.