If your baby is still ebf it’s normal (according to my health visitor and a pediatrician that I spoke to). Babies ebf can go up to 10 days without pooping. They say to check if baby is peeing normally, that’s the most important thing.
My baby sometimes didn't poop for 7-14 days, doctor and midwife both said it's normal when ebf
So my daughter is EBF and she used to have this as well. She wouldn’t poo for like three days sometimes four and then all of a sudden it will just come. But now that she started weaning, the poo has changed to more solid and comes a bit more regularly. X