Absolutely play therapy is for children experiencing trauma. Trauma of any kind. It’s a fantastic intervention to support children struggling with social and emotional needs with or without a medical diagnosis.
However play therapy is not a solution. In the same way counselling won’t solve all your problems. Play therapy provides a space to work through and process trauma and in the majority of cases is proven to improve emotional behaviour and emotional literacy. So for some children it will be enough but if there is a man underlying medical need that will remain present for the child.