Baby rolling on tummy to sleep

So my 6 month old just recently mastered rolling from back to belly and she’s been rolling to sleep. She still can roll back to belly very well. She sleeps in her crib for naps and sleeping on her tummy has made me nervous I know the AAP says as long as you place them on their backs anything they do after that is ok as long as they are in a safe sleep space. But she sleeps in her pack n play at night in our room and she can’t roll quite as well in there because it’s smaller. So she’s been sleeping on her back in there even though I see her try to roll. She usually cries a little because she wants to be on her belly but eventually she falls asleep. Well tonight she rolled completely over but she rolled onto her arm and it got stuck. I let her try to work it out and a couple times she rolled back onto her back but then she just rolled back over but couldn’t get her arm out. She was fussing and I didn’t know what to do so I moved her arm. Again she was completely on her tummy just with her arm under. Is this ok??? I’m a nervous mess because she’s never slept all night on her belly. Also she hasn’t been sleeping well lately but since she’s learned to roll to sleep she slept so well. She fell asleep instantly tonight. Is this all ok? Should I be doing something differently?