Badangel, how many miles do you ride now in a typical 6 hour day? How fast do you go? What's the budget? We have to assume you're pretty fit, to spend that much time riding.

The big bike makers want to sell $3000 ebikes to customers that mainly ride a bit on weekends or after work. A few might commute to work. I don't think this kind of bike makes sense for food delivery. I would want a bike that uses off-the-shelf ebike batteries so I could have a spare for $300-400, and not be paying bike shop prices of $800-1000. With a spare battery, you can carry it or have it on charge. Also I'd want something inexpensive and ugly to mitigate theft. It's going to have a throttle to save energy getting started from stops. It's going to have pedal assist for efficiency.