is my baby sleeping unhealthy?

the past week or so my baby will go to sleep anywhere from 10:30pm - 11:30pm and will sleep until literally 12pm in the day. and he doesn’t really wake up for feedings i just hear him starting to become restless so i give him boob and he will latch for like 3-5 minutes while he’s still sleeping and then just stop eating and stay asleep!!! is this bad? he is 10.5 weeks old!