Hi,
losing weight, and eating low carb, and taking up exercise, are the best possible ways to reverse type 2 diabetes.
Will it be enough to return you to nondiabetic levels (6.3 is still much higher than normal - truly normal is < 5.0)? We don't know. Maybe. But keep up the great efforts.
Hba1c is an average of 3 months results, so likely if you keep up what you're doing your hba1c will drop lower over time.
Your health is literally in your own hands.