My little boy is constipated😞

Kayley • 24 years old, I have a little boy who’s 4 and I’m TTC my second baby!! 👶🏻
My son is 10 days old and he has been struggling to poo lately, only doing one a day, his poo isn't the softest either, any advice mum's? He is on formula due to me not being able to breastfeed. Any other mum's notice their baby is struggling to poop?😞