Not really, pizzas are delivered as they're cooked, supermarkets pack orders overnight, or at least hours before delivery times, and have cold room storage but hot food wouldn't fare well being delayed.
They use casual staff in off hours to pack orders, they don't have enough day staff to cover making dashes for hot food just as each truck is ready to go. They have to turn a profit after all.
Also, and most importantly, pizza vans make a B line for the address, supermarket vans make stops all along the route.
e.g. the nearest to here is a good 25mins drive away at top kliks on the highway so add a few stops in towns off the highway and delivery time stretches to hours. I wouldn't want to eat something that's been 'on the road' in this climate for a few hours except under refrigeration.
It not only wouldn't be hot any more, it could be salmonella central.
Not sure but I think it would be illegal, besides stupid, for them to deliver 'hot' foods under the conditions they operate in.