This website is an excellent place to visit for anyone with T2DM or pre-diabetes. Follow the link to see their short video listing sever ways to reduce your HbA1c.(https://www.diabetes.co.uk/blog/2019/08/7-tips-to-improve-your-hba1c/). Their advice is not just about keeping the carbs down. It promotes the benefits of good sleep, de-stressing and exercise. There is advice about alcohol too.
(Picture credit: Diabetes.co.uk)