The best way to increase your supply is to pump more often. I pumped for 30 mins every 2 hours day and night for nearly a year. I switched to power pumps every 3 hours after that, and pumped extra on weekends. My supply was really low initially, but with time, and disciplined pumping, it got better. I’m planning on stopping pumping this month (I’ve been pumping for over 2.5 years) It’s been a hard road. But so worth it. Here’s an article you may find helpful: https://sg.theasianparent.com/increase-breast-milk/ if you’re looking for more tips to increase your supply.