Definitely an AI fake.

A complete Rainbow... photo was taken at around 30k ft above the Earth. On the ground, we usually only see the arc half of the circle.
Credit Photo: Lloyd J Ferraro
There seems to be doubt about the authenticity of the pic:
https://www.reddit.com/r/Damnthatsinteresting/comments/11c6yii/complete_rainbow_taken_from_30000_ft_in_altitude/

More details/photos: http://bit.ly/3SvxXbw

Complete Rainbow taken from 30,000 ft in altitude. Photo by pilot - Lloyd J Ferraro

Posted in r/Damnthatsinteresting by u/cenabollywood • 5,328 points and 106 comments

reddit
@Rojertb I’ve seen a circular rainbow from the cockpit of a plane, but we were looking down at it.
@canayjun @Rojertb because the sun was above you - that's the only way to see a circular rainbow really