Larger OE wheels (20 or even 18) on an midsized SUV is a fairly new thing. It use to be that the AWD would have 16 or 17”. The AWD especially would get more cushion to counteract any road noise or handle the extra weight. It’s purely aesthetic to have 20” wheels on this sized SUV, there is no functional reason. But even the 2021 Pilots and Highlanders have increased their sizes.I think they are 17”. I hadn’t looked but the sizing did seem pretty limited on the Conti’s
Example: Toyota Highlander Tire Sizes