No. iCloud Photos and Files are and have always been non-e2ee and they already scan everything in it.
Even with e2ee enabled for iCloud Photos/files (which NOBODY uses, and furthermore is entirely disabled in the UK), it sends identifying hashes of plaintext file content to the server without e2ee.
Even with e2ee enabled for iCloud Photos/files (which NOBODY uses, and furthermore is entirely disabled in the UK), it sends identifying hashes of plaintext file content to the server without e2ee.