As of my last update in October 2023, there is no widely recognized artist by the name of Harrison Millard in the music industry. It is possible that he is an emerging artist or a local musician who has not yet gained significant attention on a broader scale. If Harrison Millard has released notable works or made an impact in a specific genre after that date, I would not have information on those developments. If you have more context or details about his music, genre, or any specific works, I can help you analyze or summarize that information. Alternatively, you might want to check the latest music platforms or news sources for updates on this artist.