iMessage does not use the CSAM scanner, only the upload to iCloud Photos does. The iMessage feature is a local porn-ish detector on sent/received images with a

iMessage does not use the CSAM scanner, only the upload to iCloud Photos does. The iMessage feature is a local porn-ish detector on sent/received images with a click-through. It is only for children on family accounts, and if the child is under 13 a click-through is reported to the parent.