11 day old eating habits

Hey moms, my 11 day old baby boy is strictly breastfed. He started out with a shallow but good enough latch and was eating for 15-20 minutes each feeding at every hour and a half to two hours for the first 5 days. Now, he’s been eating only 1oz (I pumped and put it in a bottle-which he took great) for 5 min every 40 minutes to an hour. He’s had plenty of wet diapers (7-11) a day, along with at least two poops a day. Poops are yellow and seedy. I’m wondering if any other mamas are going through the same thing? I’ll also mention he was 10lbs 11oz at birth and is being weighed again tomorrow at 12 days old.

He was jaundice and slept a lot the first 5 days so I’m not sure if that has something to do with it. He’s now cleared of jaundice since day 7.