No, Aeons are bare minimum multi-galaxy level. It's just all buried in side quests and Simulated Universe lore you only get because you stepped sideways twice on a Sunday while wearing a yellow hat :catskully That and the series does an incredibly ass-backwards job of explaining its own cosmology. The worlds the Express visits aren't just separated by physical space, a lot of them exist in different realities. The series will just interchangeably refer to these realities as worlds, galaxies, and universes fucking willy nilly with no consistency though. Anyway, the actual fight between the Aeons that kill Tazzyronth destroyed more than one of these realities in the final clash alone iirc, and we know each of these realities can hold multiple star systems because in a not!Oppenheimer quest the IPC blew up twenty-seven star systems in a single activation of a super weapon. Which they mention as "approaching" the power of an Emanator. Actually iirc Nanook and Nous also figure it...