NASA posted the Artemis II raws this week
Yes, the NEFs from the D5s and Z9 the crew were using in the cabin.
Some info on the dataset is here https://pds-geosciences.wustl.edu/missions/artemis2/index.htm
Most of the iconic stuff is at the top of the "fd06" folder, but there is some fun stuff throughout the archives, like bracketed sets of the far side of the moon. If you wanted to see how the images looked with your personal processing, here are the files to play around with!