To ask them to post a video of their process. Though is AI video good enough now that they could fake that too?

Have you never seen anyone do a photorealistic drawing? They're easy to find. Surely no-one's asking me to get in touch with an old girlfriend so that I can demand she makes a video??

Noooooooo, the bot posting all these AI pics, you seemed to doubt they're AI. I know skilled artists can do photorealistic drawings, AI will have learned to do it from them, so I don't think people are doubting your ex.

I looked at the other drawings, one of them was on a canvas like texture but none of the pencilwork is affected by the texture.

This is the image, which they posted asking people to rate their pencil work, this is not how pencils work on this texture.

Yes, terrible fake.