Nash provides a map with drivers' geolocations when they are available. If you have a delivery that has been picked up, and notice the driver is not following the anticipated path to dropoff, that could be due to the driver stacking deliveries. "Stacking" refers to when the driver picks up from two locations and drops off to two different locations.
You are able to reach out to drivers directly, or for providers such as Uber and DoorDash, you can reach out to their support team to inquire.