Ok to sleep on tummy at night?

My LO also kept flipping since that age and can only fall asleep on her own that way (she’s sleep trained). We watched her like a hawk at first (and she was always okay.. creating enough space at her nose region to breathe) but afterwards when she was able to push herself up well, we relaxed a bit. We still have the baby monitor on for all naps and sleep though.. to check on her. Her cot is also bare, to reduce the chance of SIDS. There is still always that risk, of course... but I think and hope my LO will be alright