FTM help with feeding and sleeping

My LO turns 5 months this week. Before he was in a swaddle and would only wake up once during the night to feed. Without swaddle, since he started rolling over a month ago he wakes up twice. If he does drink when he wakes up, is he actually hungry? The longest stretch he's had is 4 hours without swaddle. His crib is in our room but next month I plan to move him to his own room and sleep train. Does sleep training make a difference and help with being able to sleep through the night or at least longer stretches