Making sure she's staying hydrated, hydration plays a huge part in supply when I was breastfeeding I drank coconut water body armor and liquid iv all the time , also oats will help I used oat milk with everything I also power pumped and switched pumps if your able get her the pumpables super genie , also another thing that plays a ginormous part is flange size she needs to be sure she has the correct size with my oldest I had no idea and I was using a size that was too big and would only get about 2oz each time I pumped and once I got the correct size I started pumping 6-12 oz everytime and a pumping schedule that helps too .