Apostpartum patient tells the nurse, "my baby does not pass soft stools every day." which instruction should the nurse give the patient?

It is pretty normal for infants not to poop every single day. The reason behind this is the complete absorption of milk nutrients. Infants feed on breast milk which is highly nutritious and sometimes body absorbs all the milk leaving a little to move through the digestive tract to intestines.

Hence, It is pretty normal for an infant to poop once in a week.