Interestingly, what you are describing is the fact if you eat first thing in the morning (especially if it’s carbs) then your body releases insulin. Starts a hunger cycle.
By not eating first thing your insulin levels stay lower, then when you eat later on you truly are hungry and in my experience tend to feel fuller for it.
Cuts some of the calories out of the morning. Then not eating after 7pm can be hard as your body has been releasing insulin after meals and in my opinion this is the hardest bit (I’m an evening snacker).
The 16 hours with lower insulin levels is supposed to be really beneficial for a whole host of health reasons.
I think there is possibly an element of stomach shrinkage too.
I’m not long term on this though, so interested to hear people who have been intermittent fasting for years?