I think so, her running leap is 180 degrees.
I just think she is starting to split them too late. I am not sure when you should start. I don't think she starts until she pasts perpendicular to the floor or a handstand position. (if that makes any sense)
How do you teach this skill?
Sure that makes sense! I teach them to split at perpendicular, as they hit a handstand position through the back handspring. If she's starting past that, there's really no time time to show off a good separation of the legs.
What tends to happen with gymnasts in this situation is they get too cerebral! In their minds they build it up into a sequence of things they need to do to pull off the skill. Sometimes that sequence in their head can be incorrect, and it manifests in the skill. Instead of 'set, back handspring, perpendicular
& split the legs, rebound' she may be thinking 'set, back handspring, perpendicular, separate legs, rebound'
It's easy to get confused since that perpendicular handstand position occurs pretty much right as their hands hit the floor. Ask her to describe the skill verbally to get an idea of where her mind is at. That's the biggest clue as to why their skills turn out the way they do I find.