BF moms, when you nurse your baby's to sleep do you wake them up and burp them? Or just let them…

BF moms, when you nurse your baby's to sleep do you wake them up and burp them? Or just let them sleep and once they wake up burp them? I don't burp him until he wakes up which isn't until the morning around 6. Or when I get up to change his diaper in the middle of the night . What do you do just curious?