Hi mama, just also wondering how long you’ve been pumping for because your body needs time to get used to the pump too. Thought I’d put some tips here: https://kellymom.com/ages/newborn/nb-challenges/maintainsupply-pump/ This website is a little messy with all the ads but there are some good tips too: https://loveourlittles.com/how-to-fully-empty-breast-with-pump/
How long do you take to pump? Usually after 10 minutes the amount will be almost maximum, but you can pump 15-20 minutes to preserve the supply. The more you pump the more efficient it will be
I had issues expressing efficiently till I had my 1st session of post natal TCM massage (tuina).
At least 30 min, usually 45