Girls, hello! The baby hasn't pooped for 4 days already, she's not bot…

Girls, hello! The baby hasn't pooped for 4 days already, she's not bothered by anything, she's pooping well, but it's starting to bother me that she's not pooping. How can I help her with constipation? I started giving her yogurt and lots of water today. How do you help your babies with constipation? Also, my little one has been sleeping in a stroller since 7 months, I've tried everything, she stopped sleeping in the stroller and now I don't know how to put her back to sleep in the stroller again so we could go for walks and sleep in fresh air... Thank you all who answer my questions and help! Sincerely grateful to you!