I am Pre T2 with shockingly bad family history. I wear a CGM all the time. T2 is a long term energy surplus disease. Carb restriction can be used to mitigate the acute symptoms but does not treat the underlying root cause.
If you are not showing signs of metabolic syndrome, you frequently exercise with high and low intensity and are vaguely in energy balance there is nothing to this, dont worry about it.
If you have a scary family history or other reason to think your insulin response may be abnormal, wrap your carbs in exercise or fiber. If I have a bowl of white rice, my glucose goes to high and the overproduction of insulin often but not always makes it go too low. If i have the same rice and get on the bike, it does not happen. If i have a big handful of carrots and add some form of fat to the rice, the effect is blunted significantly.
The carbs are not the problem but the delivery rate can sometimes be not ideal. Fat, protein and fiber all slow the rate.
Exercise opens up a physical pathway for cells to take up glucose and it can work much faster than the chemical pathways. This means you can take up all that glucose without any insulin being added by your beta cells. I can drink country time pink leomaide 10 min before, during and up to 20 min after without any major glucose excursions. If i tried that outside of a workout i would feel like crap for 4 hours.
So, to sum all this up: Eat full meals made of actual food. Dont make a habit of eating pure carb things by themselves (without some fat or protein or fiber) unless its around a workout. Treats every once in a while wont kill you, ice cream and beer all by itself every single night just might.
btw, beer does odd stuff to blood glucose. I only understand 1/3rd of what I am seeing but it has resulted in me drinking more athletic brewing company IPA and a bit less (but not none) real IPA.
If your A1c is even a little high in the pre range ask your dr for a CGM script and wear it for a month or 2. You will learn so much by watching your body respond to stuff that this will all become super obvious.