I feel that 40ml per side after latching is a good amount, considering that lo has fed to his/her content. I did power pumping to increase supply. I've read on forums some mummies pump in the middle of the night to increase supply too.
Continue to pump and latch. Also,milk booster is kind of personal, papaya fish soup may work for others but might not for u. Go on and explore other milk boosters.. oats, avocado, salmon, durian, red date longan tea..the list goes on.. you'll eventually find one that works for you.