Oh, I meant just mentioned in the setting books, not as part of adventure/module plots, books like The Great Beyond or Races of The Stars.
Ah okay. Again, I'd just chalk that up to the fact that all Paizo products will be Golarion-centric. Even the ones that, on their face, have nothing to do with Golarion.
This is just pure speculation on my part, but I bet there are millions of gods throughout the planes. However you won't read about them in Guide to the Great Beyond because they have no influence or presence on Golarion. The Outer Planes are just so vast that you can expect to find literally anything out there. But then, that book only has 64 pages, so they stick with detailing the stuff that GMs can actually use. Same with the outer space books.
Mind linking where JJ said that Aboleths would get judged by Pharasma? It sounds like that thread would be interesting to read if THAT came up.