This is actually a well studied phenomenon in research as autistic people have been shown not to have worse social communication or empathy but differently structured kinds that are sometimes incompatible with neurotypical people (I’d go find some papers but im typically this from bed in the morning)
Also if you’re looking for resources on how to best support and work with neurodivergent people I highly suggest you pick up The Canary Code by Dr. Ludmila Praslova, it’s probably the best text on the subject to date: https://www.penguinrandomhouse.com/books/742858/the-canary-code-by-ludmila-n-praslova-phd/
Which is kind of what the point is. Start it without a habit, form a habit of playing that makes you want to do the action of exercise