Milk supply growing

Does your milk supply grow as your baby needs more to eat? I'm only pumping2-3 oz which is all baby needs now I guess but I remember when I pumped with my first born I would get like 4-5 oz on each side. This time around I'm pumping a lot earlier though because baby hadn't gained weight at 2 week check up... but hopefully back to breastfeeding soon🤞🏻 just wondering though 🤔