SOC along the route is Wh/km × distance on the driving polyline, starting from your start SOC, looking for chargers at the search threshold, and trying not to arrive below reserve. There is no hidden “speed slider.” If you drive faster than the trip that calibrated your Wh/km, you will arrive lower than the stop card.
Presets include a typical highway Wh/km. Override it after a real trip. A default real-world factor of about 0.85 versus rated range exists in configuration as a planning margin when you have not set efficiency yourself — still not a speed model.