What do you think people outside of Gilbratha and, more broadly, Lenore think/“know” about the Raven Queen?
She would obviously not be as famous outside the city as she is inside of it, but surely rumors would have spread by now about a dangerous yet revered blood sorceress aka supposed higher being running wild in the city, right? Traders and merchants who visit the place would definitely spread the tale when they leave! It has also been mentioned repeatedly that many people travel to Gilbratha in the hopes of joining the University, so needless to say, people from all over the continent would arrive, hear tales about the Raven Queen and possibly even witness her actions first hand, and then leave to go home with new stories to share with their friends and family.
Knowing human nature, these stories would only grow more and more distant from the truth the more often they get told and the farther away from the city you go.
Also, other nations’ spies would probably be very interested in her exploits, wouldn’t they? So the other nations have to be aware of her, too, and even if they might initially scoff at the rumours, the fact that events just keep happening and that Lenore’s higher ups are clearly panicked might give them pause.
I’m also sure I remember it being mentioned that either the university or the High Crown reached out to other nations to inquire whether the RQ is one of theirs. If they did the same afterwards and realized they have no idea where this super powerful sorceress came from either, they too might grow worried. After all, if one random, dangerous entity can plop up from nowhere, what is to say there can’t be more?