That pretty much _is_ what it is called. It's generally known as Chat Control, but "Chat Control 1" (the thing just rejected) is called "Extension of the temporary derogation from the ePrivacy Directive to combat online child sexual abuse", and "Chat Control 2" (which you'll probably have heard more about; it's the one that keeps reappearing and disappearing) is called "Regulation to Prevent and Combat Child Sexual Abuse".

It's already called "Extension of the temporary derogation from the ePrivacy Directive to combat online child sexual abuse".