Citadel orders showing up on EC/Evemarket?

I have tried to do some research and I just can’t find much information on it. What causes certain citadels to show up on the websites but others do not?

Citadel orders require the third party service actually querying each citadel’s order book. They dont show up on the region order books. This is due to ACL/permissions. I’m not sure if any of the order propagators are pulling all the citadel orders and compiling it into one page.

So say, eve central, they specifically query for say the “Maila - Care 4 Kids “Super” Market”, I would assume at the behest of the owner, so that it shows up?