Its easy to spot AI generated arts and so far there's no participant submit a the same like art on the contest so maybe other participants are aware that they have less chances to win if they use this because for sure many people will criticize them for submitting a AI generated art. So far we can see a good submission so maybe we will mot see this kind of art at the moment.
Thanks for the replies guys and providing the links with some more information behind it. I have no knowledge nor talent for art so was mainly curious about it. Good luck to all the participants and it will be interesting to see the submissions of everybody!