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7 days agoUsually Lemmy/piefed does a pull of the most recent 50 posts when the follow first happens. Then new posts come in over time via federation.
If you’re not getting /any/ new posts it may be that the federation is not working. If some communities gets posts more than others then it’s probably a difference in activity levels in the communities.
Piefed has a couple of different ways to populate a new server. Pulling lemmyverse data and subscribing to comms that way, or scanning a remote Lemmy/mbin/pieces server for comms. You can look at that code if you want inspiration.