The problem with capillary glucometers is that they do not provide a complete picture, as they are based on a limited amount of data. CGM, on the other hand, shows what a regular glucometer can easily miss.
For example, mega-spikes that occur when breaking a fast (in my case after a 24-hour fast). I used to break the fast with a portion of sprouted green buckwheat. It seemed healthy and safe. But CGM showed: a record high blood sugar spike up to 9.8 mmol/l. That's huge stress and damage to the body.
So, for the first 8 hours after fasting, it's best to exclude all carbohydrates until the digestive system is functioning normally again. Next time, just green vegetables and sprouted beans.