Best formula for 9 month breastfed baby

I'm going to have to start supplementing with formula on the days I work. My daughter is 9 months old and has never had formula ever. I only work on weekends so it will only be once or twice a week during my shift. My freezer supply of breastmilk is just about gone and pumping right now just isn't the best option for me.

Which formula should I use for a baby who's only had breastmilk for the past 9 months? 🤷🏻‍♀️