Girls hello ? Who's on IV and breastfeeding, question for you. You fir…

Girls hello ? Who's on IV and breastfeeding, question for you. You first give the puree, then breastfeed with formula or vice versa. How many read that first puree, then formula, there was recently information that until 9 months old first formula then puree, and something I'm in shock. Or without difference? Share who does it like this? Thanks ?