Baby not pooping

My baby hasn’t pooped in two days. She is 2 months and formula fed. I have tried bicycle legs, putting her on her belly, and rubbing her belly.

This has been happening for a week. She went one day without pooping, then the next two days she pooped a little mushy ball. Then two days nothing again, and the next day she went a lot and mushy. If it’s not hard when she does go, does that still mean she’s constipated?