Lots to like in this photo.
Rock solid, classically correct lower leg, rider exactly in the center of the horse and in balance, out of the the saddle the correct amount for the height of the fence, back flat and relaxed and head and eye up looking for the next fence.
Only two quibbles, as other posters have mentioned: You could use a more generous release, including an auto release, and the amount of fold or angle in your hip is more than the size of the fence requires.
One other comment: while the horse has an apealling expression and a good, tidy front end, he is not rounding over this fence at all. He has a jumping style described as "splinter belly" or "landing gear up/landing gear down." It may be that he's smart enough to know he doesn't need to make a big effort over this fence, and rounds nicely when put to a fence that requires it. It's subtle, but I also think he has a tendency to lay on his right side in the air. If he were mine, I'd be doing a lot of gymnastics with bounces and tight, technical distances to encourage him to use his whole body over the fence, rather than just snapping his knees.