In the US and none of the food delivery services deliver from some place as far away as 50km. I don’t know why you think that would be necessary in the US. That being said I have never received a food delivery that was cold or that wasn’t delivered in a timely manner.
I was poking fun at the fact that distances in the US tend to be bigger than e.g. in Europe, I figured that the delivery apps don't allow for that much of a range. Since I've read the complaint about cold food frequently, but like you have never received cold food, I figured it must be some US specific thing (but I guess not).