Hello everyone ? How many hours do your little ones sleep during the d…

Hello everyone ? How many hours do your little ones sleep during the day in total? At 4 months old. We start at 8 am and go until 9 pm, maybe they can sleep up to 1.5 hours max. Half an hour in the morning, half an hour in the day and half an hour in the evening. They say that they should sleep more, but I can't put them down for longer ?