Hello! Completely normal as long as it is mustard yellow :) texture can even be a bit chunky / stringy / beady.
I exclusively pumped and then now completely on formula for my 2 month old. In the first month or so, my baby pooped after every feed (10-12 times in a day). Sometimes even twice during a wake window, as we change a soiled diaper before feeding > he poops while feeding > have to change after. Most I've gone through is 18 diapers in a day! This is because breastmilk is a lot more digestible than formula, so babies expel faster.
It gets a bit less frequent after the first month as baby's gastrocolic reflex goes away. Remember to change the diapers frequently so as to prevent rashes and uphold baby's hygiene :)
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