The increase after a meal is directly related to the amount of carbs I consume. I had a meal out, pizza, chips and pasta, the holy trinity you might say. My bloods went up like a rocket, but came back down in equally dramatic fashion. BUT typically, my bloods will be around 5mmol/l before my evening meal, rise to 6mmol/l two hours after and continue to fall again.
I don't know what effects my dawn phenomena, some days, like today, it goes up to 8mmol/l some days, others higher and some lower. I do feel if I could get rid of it, my bloods would be in better shape.
I do use a CGM, Dexcom One+, these days, and the information you crave, can be found in them. Good luck.