Quick guide on usage, for example beehaw.org, beehaw.org is in the orange bubble and therefore is federated to all instances in the orange bubble. Equivilantly, lemmy.ml is in both the orange and the red bubbles, and therefore is federated to all instances in both bubbles. Mocked up in ms paint 😭
I see beehaw.org and discuss.tchncs.de in each others instances list.
They are both federated. Thats why tchncs is in the orange bubble
Just tchncs also links lemmygrad, which beehaw does not so tchncs is also in the red bubble as well
doh, I am stupid. sorry