I think that if your baby is able to move her head side to side & get it up a bit there shouldn’t be any issues. Both of my sons did it since 6 weeks old but they were both able to move a lot. My 3 month old also wears an owl sock (just for a peace of mind) & he sleeps so much longer ever since (6,7 hours without waking up). Just make sure to not have anything around the crib! Hope this helps!
My baby does this too. He is able lift and turn his head and has enough space to breathe.
Now is the time to transition to from swaddles to sleep sacks, if applicable. As long as her arms are free there's nothing wrong with this sleeping position. My baby is at the same point. She rolled over last week for the first time.