1 week old - how often should she poop? Worried.

Hey everyone, my baby girl was born August 6th at 9:17 pm. She was having regular daily or more poops until yesterday. The last time she pooped was around 6 pm Aug 12th... I have been formula feeding. At first was the ready-made pre-made bottles but also have incorporated the powder formula since we are home. She is still tooting and eating well and often. I just read where pooping at least once a day is good and then elsewhere where it's okay if they go a couple of days without pooping. Does anyone have any insight here?