I've spun up a new instance and understood that there would be no initial communities under All.

I know I needed to search for a community to get the federation to get started, but do I need to search for every community for the to appearing the list?

The servers been up for almost 24 hours and I still only have the 2 communities I searched for in the list.

EDIT: Found my answer. Seems like each new community needs to be searched.