It is not too uncommon in my experience of 4 hamsters over the years, mine would wake about 7-9 pm maybe which is till quite late for a child owner to have some one to one time with their pet
I would not worry though that there is something wrong unless his eating, drinking, or toliet habits change.
If you want him to get up earlier you have to manually change his body clock. I have never tried to do this but I would gues you have to make it darker earlier in the evening and lighter earlier in the morning.
So can you put him in a dark place in the evenings, and a place that gets the light in the morning, try to then not disturb him during the day and hopefully he will wake earlier. Maybe hiding food round the cage and new toys even toilet rolls will give him activities to get up for, we wouldnt get out of bed if there was nothing to do, I dont know what you have for him, toy wise.
Hope this helps