If you reset both trips back to zero, before starting to charge, then go into the charging screen.
Set the slide bar to 80% level and then it should display a PREDICTED range when the charge is complete.
This figure can and will fluctuate depending on ambient temperature.
It will be higher in the summer and lower in the winter.
Because you have removed all of the historical efficiency data stored in the car, it then it loosely predicts the range generally based on traction battery SOH.
When the car was new, then when setting the charging level to 80% ( in warmer weather conditions ) you should return a predicted range of about 210 - 212 miles.
Remember that when you boot up the car after the charge, ensure that everything is turned OFF ( especially the HVAC system ) and the car is n the default mode of normal and Regen level 3.
As the car ages and more charging cycles have been clocked up + the mileage has increased, the predicted range will reduce for sure.
This is due to a small amount of battery degradation and is pretty much unavoidable.
On the long range model, if your predicted mileage at 80% SOC is less than 200 miles when complete and you have only covered approx average milage, then your pack may require balancing from an AC outlet.