If it were me, and this was my horse, i wouldn’t even try to make her canter. I have a whole bunch of horses ‘with issues’, and every one of them gets to set the timeline.
It’s a two-pronged approach : Their physicality and their mental stability.
How i want every horse i own to be is happy and healthy. And when i ride, i ride the horse’s body and the horse’s mind.
Trust is the base from which everything else builds. And with some of them, it takes a long time.
The foundation MUST be solid in order to build upon.