S26, S26 Gold and Enfamil are a few of the recommendable formula milks out there in the market. They said these milk has less sugar which is good for babies.
To have a successful breastfeeding journey, always keep in mind to skip the formula. Trust on your supply. Anyway, a newborn should only need a teaspoon of milk within 3 hours so if the mother doesn't have a lot of milk yet, remember that the baby doesn't really need a lot.