First congratulations!!!
I guess your question is: how much can we rely that a cut-off point of HbA1c < 48mmol/mol is free or risk for diabetes?
I am also in remission, and doing research on this subject. If you have achieved that nice levels, you are eligible to go to the next level, like a game. Ready?
Second level. Your taks is to show that your body is again able to clear 70g of glucose in two hours (a 2h OGTT). See the bottom for details.
Can you do it outside of the diabetic range after 2hours? GREAT !
Third level. Show that your body is able to pass the 2h OGTT outside of the prediabetic range. Can you do it? GREAT !
Fourth level. Show that your body is able to graph a 2h OGTT curve similar in cusp and form to a normal person. That likely means you have now recovered first phase insulin secretion to a great degree. Can you do it ! GREAT !
...and more levels unlocked after you achieve these ones !
Your tools:
Diet, low carb, slow carb, nice fats
Fasting: 12h, 16, 24h intermittent, 7 day fast. Buchinger method is in my opinion one of the best.
Exercise: walking, high intensity interval training, jogging, weight lifting, etc.
Resting: 6-9 hours nice sleep
Drugs: we are here for the long run. If you need to use drugs to heal your body use them! who cares that now you are not "in remission". For a suggested pharmacological protocol give to your physician this reference.
DeFronzo RA. From the Triumvirate to the Ominous Octet: A New Paradigm for the Treatment of Type 2 Diabetes Mellitus. Diabetes. 2009 Apr;58(4):773–95.
Hope you find it amusing. but I am serious as well.