11 weeks old sleeping 4+hrs

I think as along as the baby gains weight it should be fine. At least that’s what I have been told

That’s absolutely fine, if he was hungry he would have waken up for a feed!
I’ve never woken up my girl for a feed.
They know they to wake up.
My baby is 15 month old now.
But she was doing now when she turn 2 months old

Both my kids slept through from day one never woke in the night for a feed try increasing his milk little at a time not to waste it though the day. If he's hungry he will let you know.

My son does somewhat of the same thing. He’ll be three months on the 1st, and he sleeps fully through the night for example, from 8–9 PM to 6–7 AM. He’s 13+ pounds and 28+ inches, and his pediatrician tells us it’s perfectly fine to let him sleep through the night if he’s eating well during the day. He’s always eaten more than most babies during the day and very little at night, and he’s gaining weight well, so he’s fine to sleep through the night. I would definitely ask your pediatrician too, just to make sure he’s gaining weight and eating well. Some babies are just easy with bedtime. My son loves his bed, and if he’s tired, he can put himself to sleep all we have to do is lay him down. For naps, he usually takes 2–4 short naps during the day, which is normal for babies who sleep through the night. As long as he’s not sleeping too much and your pediatrician says he’s gaining weight and eating well, I don’t really see a problem. Some babies just really love their sleep!

Enjoy the sleep love!! As said above as long as little one is good with their weight gain enjoy it!!