Low breast milk supply

Hi mummies, I’m currently 10 weeks post partum. My breast milk supply is very low only 40ml per 25min pump. I was told by lactation person to pump every 4hrs to maintain long term… I’ve been taking legendary milk supplements since the beginning of breast feeding journey. At 10 weeks, is it possible to increase milk supply? Or my boob really low supply? I’m using spectra dual compact. Could it be the pump? Appreciate advice from fellow mummies 🙏🏻 I really want to increase my milk for my bb! #firsttimemom #firstbaby #firstmom