Good question! I know that, for me, not feeling full has to do with meds that affect my appetite. I know that because when I wasn't on meds I was thin and seldom felt very hungry.
But regardless of the reason, I don't understand how not to feel hungry unless I eat carbs, or "a lot" of whatever I'm eating, even if it's healthy.
I wish I had an answer or even some ideas for you, Sarah. Hopefully, someone will add to this thread.