Not every baby poops every day:) pooping every 24-36 hours is actually quite normal. If she’s not in discomfort, you can actually leave her be and let her poop on her own.. but if she’s straining/in discomfort and having a hard time pooping, a massage/gripe water/lifting her legs may help. Oh for my baby, when I lifted her legs when she was about 2-3 months old, besides pooping, she would also throw up.. so look out for that. May not happen in yours..
You may want to consider changing formula or giving her probiotics to improve her gut health. You can also help by doing tummy massage for her. You can see youtube videos on how to do that.