If I understand how the fediverse works (an open question :-)), the amount of activity on the home page/"all" feed/federated feed of an instance is dependent on how many magazines/communities the members are subscribed to. I've noticed that the "All" feed of the most established Lemmy instances have more posts than here at kbin.social. I would anticipate that situation improving over time as the community here grows and people increase the number of subscriptions they have. I would expect more (and more active) local magazines over time here, as well.