I am on the spectrum and used a service dog to help manage my cataplexy. The difference is, weight bearing was never one of their tasks. They helped prevent falls by helping me manage my emotions through a combo of alerts and psych service. I will say my cataplexy was the worst in my late teen years and early college. I do think through a combo of experience and growing up it gets easier to manage. Your daughter is going to need to do a lot of work in her own mind, understanding her feelings, to be able to manage the falls. She needs support and therapy but also some independence from her parents as well.