Right I get that. Lemmy.ml is visible to you in your federated feed. It sounded like the person I responded to said that this was part of the hexbear feed, which I don’t think it would be, since that only displays hexbear communities.
All beside the point though - the point is that as more and more instances defederate from hexbear, the pool of meme communities dwindles, funneling more hexbear people into the few remaining to them simply by the lack of other options.