Baby's milestones in Infant care

Hello mummies. I'm going to send my LO to infant care when he is 3 months old before I officially start work. In your experience, do the centre help with our baby's milestone eg sitting, rolling? As my LO will be spending most of his time in infant care, I'm worried about his progression. how do you deal with separation anxiety? I can feel the anxiety just imagining sending my LO to the centre 🥲