Ive always had to pay a premium on the scheme to beable to have a powered tailgate due to my condition. In my current car I’m able to close/open from with in the car, others Ive needed a small stick to prod the button with on my bad days. Likewise leather seats have always aided the egress and regress of my daughter.
Motability don’t have cars specially made for them, they are no different from what you can buy as a retail customer, with the higher trim levels offering the nicesties and “must have’s” in our case depending on the disability, which often commands a premium AP.