Tips to jump higher?

I’m an adult skater working on singles. I’ve landed everything but the axel, but it’s not super consistent. My coach has commented that I need to get farther off the ice in order to give myself more time to rotate/not look sloppy 😛 Does anyone have tips on increasing jump height? Are there off-ice exercises that I can do which target this specific muscle set, besides squats and off-ice jumping?Thank you!