It is artwork but i don't agree on using it in competitions.
This covers my opinion and explains sufficiently why: https://www.copyright.gov/docs/zarya-of-the-dawn.pdf
tldr: a comic that was denied registration of image authorship to the creator: Ms. Kashtanova for using the "MidJourney" AI technology and determining that none of the images would be the intellectual property of the author, by the United States Copyright office.
also there's a huge gap of time spent between making a prompt (and maybe editing the result) and describing what you have done in a proper software.
