Or you could read their published security guide at https://help.apple.com/pdf/security/en_US/apple-platform-sec...
For the May 2024 version the section on iCloud Keychain is on page 158.
For the May 2024 version the section on iCloud Keychain is on page 158.
Is it like that in reality? Should be easy to confirm with a MITM Transparent Proxy, someone should try to find out. Just out of curiosity.
It's exciting to find a company like Apple making a mistake, and they do make mistakes, but boy do they have quality software and it's getting better by the day. Just have a look at their SDK and interfaces: uniform and practical.