Here are some links for you, if you are a parent keen to support your teen with their mental health struggles:

Edinburgh’s parental support for emotional wellbeing of children and young adults

2. Help and support to manage your child’s behaviour
For parents of children ages 3-5 (Incredible years programme) and 6-10 (Primary Triple P programme) and ages 11-16 (Triple P programme).
Self injury
Parent club
Encouraging parents to seek their own therapy!