4 day old no poop

Baby pooped meconium 3 times first day of life and once or twice the second day. Hasn’t pooped since then, starting to pee more often. He was circumcised day 2 and was told he’d be a little off but I read everywhere they need to have number of days old they are in poops and pees at least. He eats like a champ just curious if anyone else has experienced this? Just waiting for a big blowout.