I log blood glucose, insulin, food and exercise. Unfortunately it's been up to me to work out the patterns ... doing so without data is very difficult. Some things happen over a number of days - some examples of strange patterns I have found below:-
1. When I used to have cheese sauce my blood glucose levels and insulin requirements would be higher the following day or two. This increased fasting blood glucose was reduced a little but not completely removed even if I fasted for a couple of days afterwards
2. If I exercise for more than 2 to 3 days in a row my insulin requirement and fasting blood glucose levels start to fall, the reduced insulin is maintained as long as I exercise each day. If I stop doing exercise for a single day the insulin requirement goes up and event if I exercise for days after that there is still a 2 or 3 day delay before insulin requirements start to fall again
3. My blood glucose levels increase when I exercise but the increase for the exercise is high for the first 2 days I exercise and then falls after that.
Without keeping a log I doubt I would have spotted this sort of thing. Some I can do things about ... but I can at least know to expect them ... ymmv
I suggest you try and work out patterns yourself and then ask questions about it at your appointment. The specialists have limited time to look at your data so doing a review yourself ahead of the appointment with a list of things to ask about is probably worthwhile