Hey, so I don't know if it really helped me or not, but I've been doing about 30 minutes on all fours. Think cat/cow pose or modified child pose (hips up and a pillow under my head/chest.
Apparently gravity takes hold and helps turn the baby from sunny side up
I've been doing it for a few days when I went in on Monday for acupuncture (body prep) and then on Tuesday's fluid/position check baby was right where he should be and facing the right way.
It can't hurt and actually helps my back pain a bit.
I also do pigeon to stretch my hips!
Good luck!