Good morning☺️ Girls, for those of you who have a baby on formula, cou…

Good morning☺️ Girls, for those of you who have a baby on formula, could you please share at what age you switched, whether you noticed any weakening of the baby's health (like getting sick more often), and so on?? My baby is 8 months old, and I want to switch to formula feeding, and I'm somehow worried ?? Although we've been on mixed feeding for a couple of months. Now, there's hardly any breast milk left.