I've heard that DHL urged VW and Mercedes for years to develop e-delivery trucks, but both manufacturers did not show any interest. It was kind of last resort to search for partner and start a joint venture to build those trucks.
Germany's parcel service DHL builds up a fleet of small electric delivery vans since 2014
In Chicago, FedEx has had electric delivery vans since at least 2005.
I saw a UPS truck in Nevada last month that I thought was a regular UPS truck until it sped away almost silently. I guess UPS has been converting its fleet, but I don't know for how long..
But even those tend to have much lower population density than European cities. In Europe (and especially Germany where this was developed), large parts of cities consist of multi-family homes with a high population density. Those make up a much smaller part of cities in the US.
Good for DHL. I would buy such a thing if they sold them to consumers.