I need to qualify my recommendation (apologies, I am used to working with active exercisers, runner, etc.). If you actively work out 3-5 days a week, carbs should be about 50% of your calories. My apologies.
I tried that percentage roughly with my t2d. There weren’t enough hours in the day to exercise my way out of the high sugars brought on by 50% of my diet from carbs.
I was literally exercising 2hrs a day. Recumbant bike and treadmill jogging. Given I had a job and other responsibilities plus a commute, any more time was completely unreasonable. My total calorie intake was roughly 1500 calories. My A1C was still 6.5.
Once I ditched most of the carbs (I eat 20-30g a day total now) I could rejoin the living and enjoy those 2 hrs a day doing something ELSE than running like a hamster. And my A1C runs between 4.8 and 5.2 now. Oh, and I lost weight I wasn’t able to lose in spite of all the exercising.