Experienced breastfeeding mamas, I need your help!

Hey breastfeeding mamas I have a handful of questions I'm hoping you can help me with. Bare with me if it's a little sporadic. My first born was formula fed due to a couple different issues so a lot of this is new to me.

My 3 week old has latch issues so I've been using a shield but mostly pumping and bottle feeding. (Lactation appt. Saturday) my supply is good making way more than she is eating. However she eats and eats (pumped milk) 4-5 oz at a time and still always seems hungry. Last night she slept from 1130-730 and did not have a single wet diaper, is that normal (doc told me no need to wake her since she was gaining well)

Also since I formula fed my first 4-5oz at a time for a 3 week old seems crazy to me. Is it different for a breastfed baby and normal for them to drink that much? Is it possible even though I'm making enough maybe is not nutrient dense enough to satisfy her somehow?