Sleep at night

Baby currently at 5 weeks, and wakes up every 2 to 2.5 hrs for feed and nappy change. I wonder why is he waking up so often? Is it because he's still hungry because I didn't feed him enough during the day? He feeds on average 3 hrs per day (EBF), one out of those 3 hours is spent at nighttime between 11pm and 8am.

Should I try to wake him up during the day from his naps to feed him more often, so he will be full before bed?