Nursing often and eating a balanced diet with extra calories is important to increase milk supply. You can refer to this article below which gives a comprehensive list of todos and the natural herbs and food that can increase the supply : https://sg.theasianparent.com/how-to-increase-breast-milk-supply/
Lots of things you can do - keep a food diary and find out what your boosters are. I realised mine was oats :)
Try oats, oily fish (like salmon) and durian. All are proven milk boosters!