I understand. Another low tech solution may be a cargo basket with a built-in ramp. Like the kind they use for motorized scooters.
KUAFU Folding Wheelchair Scooter Carrier Rack Luggage Basket Disability Medical Lift Rack Loading Ramp Trailer Hitch Mount Steel https://www.amazon.com/dp/B084JJ6LVW/ref=cm_sw_r_cp_