My son would do the same. As long as youe baby baby is gaining weight and seems well in himself, you're fine. My baby is such a good sleeper.
My daughter did the same! She was always so hungry and a great sleeper. She’s 3 now. Like the other mom said above me, so long as L/O isn’t spitting up excessively, there shouldn’t be a worry. If you’re still worried, give a message to his pediatrician just to ease your mind a little.
My son is 6 weeks and was 9lb 1 when born he’s on 6oz of breast milk every 3-4 hours admittedly he’s already in 3-6 months clothing but everything I’ve read says it’s ok and to feed when cues show and that they know their limits
As long as your baby is healthy and happy o don't see any reason why it should be wrong your doing what's best for your baby
As long as he isn’t overly spitting up and getting belly aches. I think it’s fine! My son was born 9lbs and has a HUGE appetite. I always fed until they were full. Never really watched oz