screenshot from the introduction to the linked article, published by Elsevier and supposedly peer-reviewed. the text starts with the phrase "Certainly, here is a possible introduction to your topic"—indicating without any possible doubt that the text is generated by AI and also, that no one in the review process picked up on this as a proiblem."
https://sb-assemblagees.b-cdn.net/media_attachments/files/112/089/302/925/415/022/original/e7c55c9d1f9531a3.png