Feeding amount

That works out to around 420ml a day, which is on the lower side for a 2-month-old at that weight, though every baby is different and some are more efficient feeders than others. It might be worth tracking whether she is having enough wet and dirty diapers each day and whether she seems satisfied after feeds, as those are usually good signs she is getting enough. That said, since you have a specific weight and age to work with, it would be good to bring her to see the PD just to confirm the feeding amount is on track, so you can have peace of mind.