Delivery Robots Market Size, Share & COVID-19 Impact Analysis, By Type (Indoor and Outdoor), By Load Carrying Capacity (Upto 10 Kg, 11 Kg to 50 Kg, and More than 50 Kg), By Number of Wheels (3 Wheels, 4 Wheels, and 6 Wheels), By End User (Healthcare, Food & Beverages, Retail, Logistics, and Others), Regional Forecast, 2023-2030