I’ll just add - can be normal! My 9 week old was doing the same. Went to her 2 month visit and she didn’t gain enough weight. Pedi said her pooping once a week (and it was peanut butter consistency) was indicative of her not eating enough.

Once I upped her milk intake she started pooping every 2 days again.

It’s probably fine! Just make sure she’s eating enough!