Thank you for your question. Mental health in Islam is termed as the struggle with the self. With self-reformation and purification, a person becomes enlightened and is adorned with beautiful character traits. Their source of strength is God and they are far away from worshipping their own egos. They are a source of blessing and peace to all those around them. Since the struggle with the self is one of the most important aspects of the spiritual message of Islam, mental health is something that is extremely important. It is unfortunate to see many Muslims chasing after mental health solutions in traditions that are sometimes even secular in their outlook which focus on the strengthening of the ego rather than humbleness in front of God, as that is usually due to a lack of familiarity with the solutions that are offered within Islam.
May you always be successful