In most examples you should see different routes when you first select a destination. They will go away a few moments or after you start driving. You can select those gray lines and they will become blue but if you have reroute around traffic selected and the longer way is longer than your threshold, it will re route the shortest route.
Yes, you can use waypoints by selecting a location on the map and click on add why you are in route . You can select the 3 dots and go into edit and move the way points up or down. I don't know what firmware update this was all added. I'm on 2022.45.15.