baby doesnt sleep?

my baby is 3 months old now and i feel like he literally never naps in the day ? 😭 hes awake for hours and while i do love it sometimes i just need him to take like a three hour nap but his naps are in intervals of 20-40 mins and no longer than that ! he sleeps 3-4 hr stretches at night but i genuinely dk what to do maybe its time to implement a routine ?