Do you have wheel chair

Yes.

Yes, they have wheelchair and powerchair rentals

Yes there is a mobility rental at the entrance of the gate that you can rent for a day.

Yes they do

Yes, they have them there for rental before you enter the park.

Yes they have some there

Yes there is wheel chair rental available.

I saw a lot of mobile carts

Universal doesn't answer these questions, local guides do. I saw some guests riding rented wheel chairs so I'm sure there is some accommodation.