You cannot request specific brands of baby meals or powder milk. Request them in advance. There are free baby bassinets for infants weighing not more than 10 kgs. They can be attached to bulkhead anchors. Parents can use their own baby car seat provided it has been certified by the government of manufacturer's country and provided the infant is flying on a child's fare ticket.
Diapers are available onboard and there are fold-down diaper changing shelves in the toilets.