Stronger suck

So I’m working on being able to EBF. My son is almost a month old and we’ve been working on latching on deeper so he doesn’t hurt my nipples anymore and it’s been helping.

But now my issue is... how do I get him to have a stronger suck? I’ve noticed that when I pump I get a lot of milk but whenever he latches he sucks for 30-60 minutes (on each side 😩) but still ends up being hungry and then I still have to warm up about 4oz of my breastmilk from the fridge. Since working on his latch, his initial suck on my right breast feels strong but then dwindles off. I don’t feel that suction on my left breast and we still need to work on latch there because it still hurts a little bit.