Any pediatric endocrinologist who treats diabetes should either be involved with dietary advice andor have a diabetes nurse educator or diabetes dietician who does such teaching for your son and both parents, grandparents etc. This should include not just avoiding simple high sugar foods and drinks but details about protein, fat, timing, changes with exercise and insulin dosing as well as actual sugar levels. If you need more information that what has been provided, let your sons diabetes team know that and ask them what options they have available andor ask for a specific dietary consultation.

If your child has type 1 diabetes, he needs insulin, diabetes education, and dietary education to understand carbohydrate counting. These teachings are done by diabetes educators and dietitians. An endocrinologist will recommend these teachings. But they rarely do these teachings themselves.
Million thanks.

Yes, an endocrinologist can help you with a specific diet for your son.

I highly recommend a pediatric dietitian who has a CDE credential (certified diabetes educator). Meal plans are best individualized in all persons living with diabetes.