Our DD has a history of disordered eating. Family-based treatment is the gold standard and can be very helpful even if there isn't a full blown eating disorder, but there are disordered thoughts about eating or restriction of intake. Here's a list of therapists trained in FBT:
http://maudsleyparents.org/providerlist.html#MINN If there isn't someone local to you, lots of people will treat over Zoom now. When we first needed help with our DD, our pediatrician referred us to one of these therapists and she was a god-send. On the depression side, it may be related and can be dealt with by the same FBT therapist or may require other intervention but the FBT therapist is a great starting point because non-eating disorder therapists are often very uninformed on the ED front whereas most ED therapists are well informed on the relate mental health issues.