If you put her in a summer camp where she had to cook her own food she just wouldn’t eat any food, and a lot of anachans spend an excessive amount of time exercising to burn what little calories she did eat anyway. She needed a stint in eating disorder inpatient followed by a meal plan, a responsible adult willing to make sure she actually ate the food from the meal plan, and a therapist to help her learn healthier coping mechanisms for the negative feelings resulting from eating. And I mean a proper therapist, not a “gender affirming” groomer one.