When I was doing a similar window, I’d eat at 12 and then again at 6 or 7 which gave me enough time for dinner and a little snack after dinner.
I may recommend, if you haven’t, counting your calories for a little to see if you’re staying within your range. Very possible you’re eating too little or not enough and you don’t realize it.
I don’t count calories. I eat when I’m hungry. I sometimes eat 3 meals and snacks in my 5 hour window. I’m doing 19/5, first month I did 16/8 and lost 10 pounds I have been doing 19/5 and lost another 4 pounds. total 14 lbs in a month and a half. every other day I eat lower carbs. Usually under 50. The other days I eat whatever I want.
Tonight I had 1 boiled potato, 1/2 cup carrots, 1/2 cup of onion/ celery cooked, 1/2 cup of corn and a very small piece of cornbread ( no sugar). 3 oz roast beef Lunch: salad with a boiled egg, cheese, chopped boiled chicken with a teaspoon of mayo.
50 carbs, 1000 calories.
I have a similar eating window. I do lunch (400 calories), a 200 calorie snack, dinner (another 400 calories), then one final 200 calorie snack before the eating window ends. Foods are usually pretty high in protein and veggies, with a serving of carbs and healthy fats during the 2 meals to keep me full.