It's not a big difference.
This topic is about Australia, not Europe. Our parking spaces are at least 240cm wide. Enough room for SUVs to park next to each other no problem.
In fact the more common SUV in Australia is the Mitsubishi Outlander. Models from 2007-2018 are only 180cm wide, just 2cm wider than a Corolla sedan.
https://www.carsized.com/en/cars/compare/toyota-corolla-2018...
2cm is not worth getting your panties in a twist about, and not worth making new laws about.