Google is full of arguments about whether “porn addiction” is a real diagnosis. ICD-11 includes compulsive sexual behaviour disorder. Research on problematic pornography use looks at loss of control, continued use despite consequences, and distress. Some people have moral guilt without a compulsive pattern. Others have a pattern that looks a lot like other process addictions.
If you are here because you keep promising to stop and then do not, treat the behaviour as a habit loop you can interrupt. You do not need a court ruling on the word to install friction, track days, and ask for help if it is wrecking sleep, work, or a relationship.