sounds like you've just described my dd (now 16).
she had some counselling at school, but I never had contact with the counsellor, or had any idea what they discussed. The counsellor booked an appt for dd during half term (!!!!) which of course didnt happen and no more appts followed. This was going back some years now.
My dd also has some of her own health issues, and was later referred to a Psychologist through her own medical team, as we all felt she was struggling to cope, and she's had several appts with this new lady. I was invited to one appt, and had a brief chat but other than that have never spoken to the lady about what is discussed. (do talk to my dd though, and she sometimes talks about the appts).