Sleeping Thru The Night

Ck
My May baby was born a month early so he just turned 6 months. I've been trying to do some sleep training with him but I'm really unsure about nighttime feeding. He eats his last bottle within in hour or so before bed (bedtime routine starts at 7) and I've been waking him up to feed him when I go to bed (around 10). I'm reading conflicting things and I'm not sure if it's necessary to wake him. He's down to getting up once a night (sometimes twice). I just feel like he should be sleeping thru the night by now. Are your little ones sleeping thru the night? Do you wake to feed? I'm afraid if I don't he will be up more and I don't want him to be hungry. Help! :)