Breastmilk from bottle. How many ounces?

My little is 6 going on 7 months and gets breastmilk from a bottle. He gets about 24-32 oz a day as well as just starting solids. He eats about every 2.5-3 hours and he eats like 3 ounces a feeding. I’ve tried to get him to eat more like 5 ounces a feeding but he refused and pulls away. We changed the nipple flow so it’s not that he needs a faster flow.

Is this normal? What can I do to increase ounces per feeding?