Earlier quoted context omitted.
What does "manual review" mean then and how are those images reported?
Before: you would upload images to iCloud Photos. Apple can access your images in iCloud Photos, but it does not. Now: You upload images to iCloud Photos. When doing so, your device also uploads a separate safety voucher for the image. If there are enough vouchers for CSAM matched images in your library, Apple gains the ability to access the data in the vouchers for images matching CSAM. One of the data elements in t…
https://digit.fyi/apple-admits-scanning-photos-uploaded-to-i...