(Mostly) pumping and milk depleting....

My lo is 7 months old and I’ve been pumping/bottle feeding about 90% of the time because of latch issues and issues with a forceful let down. She’s been doing fine with this, never had formula. I usually pump 2x daily with a medela pump in style and get 20-24 oz per session. She breastfeeds at night and first meal of the day.

Lately though my output has brfn depleting— I’d say I’m pumping about 10 oz less daily. I have recently returned to work but haven’t really changed my number of sessions per day so I’m not sure it’s that. Any way to fix this? Could it be tied to her starting solid food? It hasn’t really changed how much milk she has a day.