I've seen posted elsewhere that instance admins have the ability to remove communities from their instance with a "purge community" button. I can't find this, can someone post a screenshot/guide on where the option is?
Also, if another instance has died and wont be coming back, is there a way to purge communities from the local instance database? Maybe the same way as above.
Try adding yourself as mod in the community first.
From the screenshot I sent, I created that community on my instance. I can delete (hide) but can’t purge. Maybe my instance is broke.