Breastfeeding help! NICU BABY

Hi!

My baby was in the NICU for a month after he was born. In that month I didn’t pump as often as I should have to establish a good milk supply and was only able to breastfeed twice a day.

He’s now 2 months old and I breastfeed on demand but I also have tu supplement every feed with formula because baby stays hungry. I’m starting to pump now that I was able to purchase a pump. I’m only pumping less than 2oz a session (from both breasts)

Is it still possible for me to increase my supply?? I’m now trying power pumping. I would appreciate any tips