It's safe. Once they can roll they also have enough awareness to move their head if something blocks their face.

Mine was the same as @nomli I would roll him back over and he would fuss then roll back onto his belly lol. I remember doing it so many times one night I was exhausted haha. How old is your little one? Because if she can roll belly to back and back to belly they say it’s fine to let them sleep how they are comfortable. Some babies just prefer to sleep on their bellies!!

Everything I’ve read on this says if they can roll over they can sleep on their stomach. My oldest kids are 14 and 17 and when they were babies we weren’t allowed to lay them on their back due to choking. It’s definitely nerve wracking being a mother!

Yep! We were told that too, that once they can roll themselves it's okay. It's not Ike you can do anything to prevent it anyway, as those crib positioner things aren't safe. He started it before 4 months, though, so for the first like 3 weeks I kept rolling him back. He'd either wake up, fuss, or roll right back before I made it out of the room.

They say that if they can roll on their own then they are strong enough and it's okay.