Yes. The Coefficient of Drag of 0.23 for the Tesla Model Y is very low. Going with a crossover shape would likely increase the Coefficient of Drag. To compensate, Tesla could add batteries to increase weight and cost or keep the reduced range.
For reference, the Toyota Prius (3rd Generation) has a Coefficient of Drag of 0.25 with a similar tapered roof. The Toyota Prius V (3rd Generation variant) has a Coefficient of Drag of 0.29 with a crossover roof. Subsequently, the average fuel economy goes down from 48 MPG to 41 MPG. Roughly a 15% loss.
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Many of the EV competition for the Model Y have a Coefficient of Drag between 0.28 to 0.30. Nissan Leaf+ = 0.28, Hyundai Kona = 0.29, Jaguar I-Pace = 0.29, Kia Nero = 0.30, Audi etron = 0.30