How long does it take for baby to adapt in IFC

every baby is different and also depending when they join ifc the most recent baby (4.5 months old) that I had in my centre adapted well on 1st week. the 10-month-old that joins together on the same day still crying after a month

Im not exactly sure about my baby but we started ifc quite early at 2.5months, so far doing well. Likes to smile and cooing at teacher. Teacher feedback he would cry if no one talks to him😂

Mine entered IFC when 4 mths, took around 1-2 weeks to adapt to new environment