Huh, it looks like the groups (of communities) are instance-specific. piefed.social has lots, piefed.au doesn’t. Then there are “feeds” which… look like the same thing as groups? Of which piefed.au has Australian-specific ones (including a lot of auzzie.zone communities). I’ll have to find out if any of these are portable across instances or not, or if I’m stuck using multiple sites to access the fediverse >:|