Pass motion once a day

Hello mommas! I noticed that my newborn (3 weeks) pass her motion (bowel movement) only once a day for two days already. Her bowel is quite many. It filled-up the whole diaper. I’m not sure if once a day is normal. She is taking formula milk, S26. I also noticed she just keeps on farting or looks like trying to pass motion but nothing comes out. One more thing… we noticed she looks calmer when using pigeon bottle than philips avent. But this just happened two days ago. Before she was ok with both bottles and pass motion frequently (2-3 times a day). I’m not sure if this is normal. If not could it be the milk we’re feeding her or the teat/nipple bottle? Thank you moms!