Good evening everyone! My little one has adenoids in the first degree …

Good evening everyone! My little one has adenoids in the first degree and they've banned him from eating wheat, sweets, and dairy. But my son can't live without wheat, he won't eat anything unless it's wheat-based. I understand that it's not good for him, but he's just not eating anything, I tried everything to give him something. Now the question is: what kind of flour can be used so as not to be harmful? Also, milk? If it's lactose-free, will it work? And sugar, I think I can replace it with a sugar substitute, I want to try giving other porridge. Thank you for your answers.