These features are only available to music label and distributor partners who use YouTube Studio Content Manager and the YouTube DDEX feed with version 3.6+ of the Electronic Release Notification (ERN) standard.
YouTube generates the artist pages for the music service with an algorithm that pulls in the information you send us and pairs it with recent information from the web. We cannot update the information manually. The best way to update the artist image or discography is to keep your entry in Wikipedia and MusicBrainz updated.
If you notice errors within your discography, such as an incorrect or missing release, learn how to submit feedback to update your discography.