He was looking for a fantasy novel where the male protagonist only had one wife and the female protagonist had more scenes.

I recommend you to read "Cool as the Moon". This book is a fantasy romance novel written by the author Chu Qiushi. Although it was not explicitly stated that the male lead only had one wife, the female lead was an independent immortal cultivator expert. There were more supporting male characters than supporting female characters, so the female lead had a lot of scenes. I hope you like this fairy's recommendation. Muah ~😗