The macro photography looks bizarrely uniform and the poses contrived. I feel like a sleuth trying to decide if this is AI generated or not. I suspect it isn't, but I'm somewhat distressed at how suspicious I am of cool things now.
Here's an interesting article by the photographer about fake AI generated macro photos: https://www.nickybay.com/ai-abuse-to-skirt-copyright-law/
The people who are saying that this is not AI are either being misled or they are lying.
As someone who has done some stacked photos, they always look suspicious! If it's any consolation, I recognize the photographer and they are the sort of person who would never use AI!