There are many levels to keto diet, and believe me, you can't do the epilepsy version even if you'd wanted, it takes time and hard effort, for children it's done inside a hospital.

So assuming you watch everything they eat, you can keep track of GCM, and try very slowly. Like going from 60-30-10 carb-protein-fat to 50-30-20 ratio, do they have better consistent blood sugar ?

There should be protocols to do this for T1D the safest way.

Watch the video.