how to keep my 2months old baby to sleep more time

A. We don’t decide the time of the child to sleep a child is going to decide its own time if the child is less sleepy they may just sleep for 8 to 10 hours in a day and then some cases they can sleep for 15 to 16 hours in the day with a break they just wake up take a feed and go to sleep again so we cannot do all these things it is not in our hand