Wikipedia is about as accurate as any other site: https://www.smh.com.au/national/evidence-suggests-wikipedia-is-accurate-and-reliable-when-are-we-going-to-start-taking-it-seriously-20220913-p5bhl3.html

Further, there are footnotes so you can check anything you doubt. I note that you do not have any evidence to suggest anything there is wrong.

Haven't read "Submission". It's a novel, so while it may be interesting as art, like all art, it should be read as speculation.