If your baby is swaddled, it’s ok to keep them that way for their night feeds. The same goes for older babies who might be using a sleep bag. It’s ok to keep them in their sleep bags during nighttime feeds. Keeping your little one in their swaddle or sleep bag will help them remain sleepy throughout the feed and this can make it easier to get them down again for their next sleep stretch.
If you need to do a diaper change during your baby’s night feed, you will of course have to unswaddle or take your baby out of their sleep bag. Be sure to swaddle again or put your little one back into their sleep bag immediately after their diaper change to help them settle into their next sleep stretch.