1 Overall: My first impression is that this rider is behind her horse’s motion, getting a little left and using his mouth for balance. You can see that because the bit is making him “smile,” and he looks a little unhappy.
The stirrup is behind the ball of her foot—it needs to move closer to her toe so it’s right under the ball of her foot. Then she can press her heel down more. I think her stirrup length is too short for this fence height. She could lengthen it so there’s not so much angle in her knee. This is causing her to push her seat too far to the back of the saddle. She’s compensating being behind the