Try adding a bit of salt, either on food and on your fasting window to your tongue, keto depletes your water and you need more electrolytes and liquid.
You may think you are hungry and may be you only need a pinch of salt to your tongue.
The only thing that I find hard to achieve once doing IF+Keto is getting enough nutrients and calories during the feeding window, I mean with carbs it’s way easier.
What pops into my mind about your hunger is that you are probably not eating enough fats. Hunger should NOT be an issue if your macros setup is correct. Quite the opposite, in my experience. Fats tend to prolong digestion so that hunger is kept under control for longer after a meal