https://lemmy.world/instances is the public list of which foreign instances are federated with or blocked. LemmyWorld is federated with dbzer0 still.
Lemmy.world did ban multiple piracy-related communities from both local and foreign instances, and you can see that activity in LemmyWorld's public modlog here: https://lemmy.world/modlog . Filter by action = "removing communities" to quickly find the mod actions.