MIX FEED: Best formula milk for 6-12 months EBF

Hi mommies! I have a 6 month old daughter (turning 7 in 9 days) and I’m planning to mix feed. She’s been ebf ever since she was born. I want to give her formula milk already because I feel like my milk supply is no longer enough for her. Yes, I already feed her solids on a daily basis. Gusto ko lang dagdagan nutrients na makukuha nya while still breastfeeding her. Ano kaya milk closest to breastmilk para she won’t get confused? Please let me know your recommendations and experiences! Thank you!