Hi NICU parents , when did your preemie stop falling asleep during feeds?

My 3 month old (1 month corrected) is still falling asleep during feeds. He’ll sometimes drink as little as 1 oz and fall asleep. It takes me an hour sometimes to feed him.🥲 As soon as I lay him on his bassinet he’ll start immediately crying so I’ll feed him some more then again falls asleep and repeat this a couple of times. I mean he’s gaining weight just fine he’s even in the 85th percentile. Idk I’m just wondering did any of y’all struggle with feeds as well?