Any thin East Asians here with prediabetes?

I'm Chinese, American and Type 2 Diabetes runs in my family regardless of weight or lifestyle. I'm on the thinner side and I had an A1C of 5.7 few years ago. I freaked out and just started cutting all refined carbs such as rice, bread, noodles and of course, any desserts. I actually went very extreme. The following A1C test only went down to 5.6 so it improve but not by much. Now I'm back to 5.7. this almost feels like it's inevitable for me to develop type 2 diabetes.