Specifically, people with normal psychology (including mental health and mental unhealthy) belong to the scope of psychological counseling, while those with abnormal psychology do not.
Psychological abnormalities include: mental disorder, diagnosed neurosis and severe personality disorder.
This is all about recommendation.
What's another recommendation? What you are not good at is consulting. For example, I am good at adolescent psychological counseling, but I am not good at marriage counseling. So I can recommend people who seek help in marriage and love to colleagues who are better at it.