I saw this bike made by an independent bike shop for himself.
It’s an electric longtail and can carry a 300kg europallet, plus the toolbox on the front, plus an extra person or material on the bike rack!
Here is the link to the shop website: https://www.cycles-penet.fr/
The people who think you can’t haul shit in a bike have seriously never tried. As long as you’re on flat surfaces it’s just as easy as riding a bike without a load imo, save some learning curve for turns.