If she's not fussing at the boob then shes getting enough. Waking 1-2 hours is quite normal. My baby was up every 1.5 hours for feeds during the day until 3mo. Even at 4 months it's still a 2 to 3 hours' interval. Keep latching and pumping, your supply will definitely go up
let her latch as much as possible. maybe can topup with ebm on bottle afterwards if she really cant be full from latching