As far as I know, there are no large SUVs on the scheme and only one mid size SUV, the Mazda CX-60. All others are in the small / compact category, in spite of what Motability call them ?
Large SUVs are things like BMW X5, Volvo XC90, Land Rover Discovery, Range Rover Sport etc. Many years ago a few of those were actually available through Motability, but sadly no more.