Type two diabetics can't deal with carbohydrate at the rate usually recommended these days.
Ordinary type twos usually reduce their blood glucose and then their Hba1c levels by eating fewer carbs. I am very sensitive to carbs, and these days I stick to no more than 40 gm per day, and have two meals.
I have to endure such hardships as steak, mushrooms, a tomato, sweet pepper and maybe some courgette in a stir fry for breakfast, followed by coffee with cream and cinnamon, and a minute pinch of salt as I do not use it in cooking.
I can then go all day before having another low carb meal in the evening, and a couple of times a week I will have a dessert.
It is best to reduce carbs slowly, and it really helps to have a blood glucose tester so see how you respond to what you have eaten as there can be a lot of variation for different people.
My diagnosis was back in 2016, so I am well settled into the way of eating and it seems simple and sustainable.
Your nurse might well tell you that carbs are essential, and low carb is not - many just smile and nod, but using a meter will soon reveal how you should eat.