And, yes, the latest software updates that make the car comply with NHTSA or Transport Canada recalls also seem to have introduced a more realistic range estimate than the advertised WLTP range. For most people, the warming seasonal temps will show a bigger impact, as will sedate driving. Regardless, you might get more than the 260 estimate. For a few folks, there are error codes causing significant actual range loss. Through the Fisker Owners Association (FOA) and possibly other places, you can get a tool to clear those error codes. The FOA one will be free to members.
That's my quick take, but take SeaPhil's advice and read some threads. Coffee recommended.