How much food for baby

7m old. How much should they actually be eating. Like 1/2cup, 1/4 cup etc.. per sit down? And how many times a day. We’re BLW, but today all she ate was maybe 5 puffs, and half a meatball. Yesterday it was some puffs (b/c their higher in iron) and some grapes in a mesh soother. I feel like I should be feeding her more often. I feel bad because we’re now on the second month and she really doesn’t get much food?