You can read the articles below but its just what I said. Its all about range. What are three of the most important reason for EVs not becoming mainstream? Range anxiety, Cost, and infrastructure.
Its take a LOT more HP to increase the top speed of any car. The curve is not linear. SUVs are bricks. SUVs have a purpose in life, to haul people/cargo, go softroading. Their purpose is not top speed or racing. So if its an ICE brick, who cares? The gas station is down the street and making the Cd less don't really matter much. You will not be adding to the weight of the car by adding more batteries.
OTOH, if you trying to sell these EVs, then you want the MOST range you can get without adding more weight. You do that via making the cars slicker. And as one of the articles below mentions, aesthetics matter. If the car looks ugly in the front, who wants to buy it? So there is a trade-off.
Weight matters, CD matters, frontal area matters, and "looks" matter. They are all trade-offs.
The aerodynamic efficiency of an electric car directly impacts its range, and these 15 models are the slickest EVs we've seen so far.
www.topspeed.com
With the breakthrough of electric cars, a lot of focus is now on the range. Every kWh/km of energy consumption that can be saved, makes the car cheaper.
insideevs.com
I dont know about the rest of your question but I'm pretty sure the car makers care a great deal about Cd in EVs simply to be able to increase the range of the vehicles.
Could the ICE Macan have a smaller Cd? Probably, but the "ugly" tradeoff might not be worth it compared to the range issue. Just add a bigger gas tank.