January 2022 my HbA1C was 99, it's currently about 40 and I am currently drug-free.
My doctor put me on Metformin, which didn't agree with me—I won't go into the messy details—I was able to drop it by early July.
I changed my diet by cutting down almost completely on carbohydrates. So the usual suspects of bread, potatoes, pasta, rice and most sweet things are no longer part of my diet. I occasionally, consciously allow myself a treat but on a day to day basis none of the above. Initially I spent a lot of time looking for the carbohydrate content of everything I ate and still do with new things, although, after a while, I got pretty good at guessing the carbs in food. Celeriac has become my go to substitute for potatoes, roasted, fried or mashed I really like it and cauliflower rice does for rice. I do miss proper bread though.
Then a started taking a brisk walk of about 30 minutes every day
If you can afford it, I recommend occassionally buying and using a blood glucose monitor, I use the FreeStyle Libre2, about £50 for 2 weeks worth of monitoring. Using this I discovered some weird anomalies in how my blood sugar reacts. So, for example, I can eat a chocolate Magnum ice cream and it barely moves my blood sugar, the same is true of Tunnocks Wafer biscuits. Don't ask me why because I only need look at a digestive and my blood sugar is through the roof. Also, beer, which is high in carbs pushes my blood sugar levels down, something to do with the alcohol. Note that I'm not suggesting a diet of beer and ice cream!
One other thing I have noticed is that my average blood sugar is very closely related to my waist size. I wasn't overweight with a BMI of about 24 but the fat that I did carry was all around my midriff, So, I have gone from a 36" waist down to a 32" waist, let it drift back up to 33" or 34" and up goes my blood sugar average. I think it was Dr Roy Taylor who said if you can get back into the jeans you wore when you were 21 your diabetes will go ino remission. For me that seems to be true.
I hope the above helps.