Level 90 end of Endwalker discussion + spoilers
Reading the notes and seeing the things the NPCs are saying...
I noticed this in the second part of the dungeon if you read the data logs, it would seem that Meteon caused the downfall of at least two planets she visited, though not directly.
The people of the war torn world are fighting over how much one faction was over the other because they were the ones contacted by extraterrestrial life, likely Meteon.
In the idyllic world in the third part, she starts to ask them question about the point of existence that cause the inhabitants of that world to come to a sort of existential crisis, and being unprepared to face them, they wished for death.
Though I don't see her being at fault for the world of the fishfolk, one has to wonder how many other worlds she was indirectly responsible for causing their downfall.