Garmin Nuvi 765 can do it with multiple addresses no problem.
Out them all in and it works out the best route, I’ve used it a few times for deliveries in the past and it works well enough.
Although I prefer to use a map for routing really, just seems like there is no substitute for actually knowing where you are, and not relying on something that might let you down.
Use a map to sort your route, and a sat nav to find the exact address once you are in the right area.
If you use the sat nav to sort your route out for you, you don’t really know how to load the van logically and will be searching at every drop.