I'm on uncertain ground here. 10.8 mmol/l (180 mg/dl) 2 hours after dinner doesn't sound normal to me for a non-diabetic. I thought glucose levels returned to normal in 2 hours in non-diabetics.
In type 2 diabetes, fasting glucose level is the last to fail in the development of type 2 diabetes. Hyperinsulinema preceeds hyperglycemia by decades in type 2 diabetic adults. I've heard of young children developing type 2 diabetes but have never encountered it before in a child, teenager, or young adult.
@Nicky1875 what's happening with your daughter may be normal. I don't know. Right now I have more questions than answers.
Type 1 diabetes and type 2 diabetes can be genetic. Nicky does anyone else in your family have diabetes? If yes, type 1, type 2, or both?