Do they actually know how the technology works? They will have to scan everything inbound and outbound connections, basically managed devices.
Apple and Google have been given a three-month ultimatum to make it impossible for children to take, share or view nude images on their smartphones, British Prime Minister Keir Starmer said on Monday.



I do agree that most people probably don’t change the defaults, but I believe that apple stopped the scan for CSAM years ago on iCloud.
https://edition.cnn.com/2022/12/08/tech/apple-csam-tool
Also you forgot to account for apps like Signal which store the photos encrypted in their own database.
This is not as simple as scanned photos, currently apple for example can do this locally on their own apps. The problem is apps like signal.
Strictly by the description it should include websites too, and would have to be extremely low level to prevent viewing.
Also Nintendo should probably be concerned at how widely the law is written for the DS