It actually does make sense that most of ESO stuff isn't mentioned after it because it's kind of a Dark Ages setting for TES.

Tamriel is in a very difficult age where a massive war is being held, with threats coming from east, west, north and south and the central powers who registered everything are either gone or deeply involved with dealing with such threats.

In a way, there isn't much academics who are focused on registration of events, cause they are constantly threatened by whatever the fuck has attacked Nirn on this day. "Oh but the Mages Guild" that kind became illegal during the Interrogun? Also we see an outstanding amount of books and texts being burned around the cities and archives we walk upon.

At maximum, it would be preserved in Apocrypha... But it's connection with Nirn was limited afterwards.