https://wccftech.com/hogwarts-legacy-doesnt-directly-feature-any-work-from-j-k-rowling/

Following the announcement of Hogwarts Legacy, Warner Bros. Games and Portkey Games have put up a FAQ section on the official website.

A good portion of it deals with clarifying whether or not author J.K. Rowling is directly involved with the development of the game. In short, she isn't.