Look into clean fasting and stopping the gum. It might be triggering your hunger. I read fast, feast, repeat by Gin Stephen’s and she has a whole section explaining why little things like gum, even if calorie free can trigger an insulin response in your body, making you feel hunger.
Go keto.
Keto and IF fit together like peanut butter and jelly. Excepting the sugar and bread of course.
As long as I don’t eat carbs except from vegetables, I’m rarely hungry. Been doing OMAD for a year now.