What does the acronym CSA mean? I’m not native English.
OP check this, it’s the closest to what you want.
But for example, on kbin I am on kbin.social/m/technology. That’s not the same as lemmy.world/c/technology right? When I search for common subs it doesn’t show me the subs from the other.
There are many niche communities missing, but they will come with time and with people talking more.