Is it possible to stay in the sadle while cantering?

yes you can stay in the saddle while cantering with a little technique. You need to learn the rhythm of your horses canter since no horse gallops the same. You need to have your toes in the stirrups and almost kind of stand up each time the horses legs move forward and come back down in the saddle in kind of a rhythm with the horses canter. you might have sore thighs later, but the more you do this the more natural it becomes