What I see is a horse capable of taking the jumps quite well, but someone who is not setting this horse up for success. Circles are tight (and unbalancing for the horse learning to navigate these jumps and making judgements about stride length), and I don't like the contact on the horse's mouth (can you use a caveson, maybe?).
I will also say... and forgive me if I sound hippy dippy
but you seem to be just standing there and snapping the whip when the horse refuses a jump (likely because she isn't feeling balanced). For me, lunging is literally riding from the ground-- but instead of sitting on top, I'm controlling the horse's stride and movement with how fast I follow them, my rhythm, my voice... and maybe a little contact to keep them bending around the circle. When you are free-jumping, you can be controlling your horse's stride leading up to the jump and helping them to learn! Maybe let out the lunge and just play with how you can control the horse's movement with your body language?
I hope this helps! Your horse is positively gorgeous. :)