Change groups to more of the same level
Maybe casually ask your trainer "when are we going to jump higher" give her a hint. Or if you feel good with your trainer straight up ask.
Maybe they are afraid of the height of the jump? I'm not to sure @amygirl
If you ever feel out of place in a lesson don't be afraid to respectfully ask your trainer about it
Can you ask to be put into another group? Why are the others afraid?