When I was first diagnosed 27 years ago (Type2) I had an appointment with a nutritionist. She had examples of every size /serving of food.
She told me I could have up to 45grams of carbs per meal and if needed 15 grams for 1-2 snacks.
The biggest takeaway was she told me I could eat or drink anything as long as I stuck to those rules. I was a big Pepsi drinker then she said I didn’t need to stop drinking regular Pepsi I just had to know that 1 12ounce can had 45 grams of carbs so that essentially was a meal! I switched to diet!