https://www.testing.com/news/have-diabetes-take-care-when-preparing-lab-tests/I'm diabetic and am still expected to fast. Maybe it's not necessary for the A1c, but I'm pretty sure it is to get an accurate read on cholesterol, in which mine is high, and maybe for iron, potassium, thyroid and a few other things I have to keep an eye on. I accidentally didn't fast before my last check-up and he told me to come in another day, fasting, and get labs drawn.
https://www.medicalnewstoday.com/articles/323910
https://msutoday.msu.edu/news/2018/fasting-for-lab-tests-isnt-good-for-patients-with-diabetes
If you have diabetes and are taking meds to control your blood glucose level, and are fasting for your blood draw, you run the chance of getting your blood glucose too low.
Where I get my blood draws they have a warning sign up telling people that they don't need to fast if they are diabetic and also telling them to take their normal meds.
I am diabetic and I do fast before the blood draw but I do not take the meds because the ones I take get taken with food.