I think it’s “new-ness” bias and a “related content bias” and a “popularity bias” rather than primarily a gender bias. There’s loads of new work published all the time. Lots of it will not merit a Wikipedia article, just as many novels by the male contemporaries of Clive Cussler don’t get Wikipedia articles either. Novels that have been around for years will have had lots of opportunity for 3^rd parties to talk about them to establish notability. New novels have a harder job to establish notability because they have been around for a shorter period of time for others to write about them.