I’ve had the experience of people genuinely surprised that information that doesn’t need to exist does not exist. They’ll ask what Dooku’s first name is or what Yoda’s species is and I’ll say “I don’t know.” The assumption this all exists off-screen is pretty interesting.

I wonder if this expectation has some old root from the WEG era where all that stuff WOULD have existed.

I honestly think wikiepediazation culture sort of drives this. There's a completist desire to have all the boxes in the timeline, character chart, specs sheet, etc. filled in. I've always loved those gaps, because it means there are more stories to tell.

Dooku's first name is "Count."

But the Kyuzo at Galaxy’s edge has a name right?

Unknown things make a universe feel larger.

People also seem to think and act as if the characters themselves had all this information. After all, if Homer Simpson doesn't know Mr. Burns' first name, what are the chances anyone in the Star Wars universe knows Dooku's?

Dooku’s first name is something I wouldn’t ask because thats for a storyteller. How Mortis and the Wellspring of Life connects is something I would because maybe theres complicated info I missed or don’t understand.