Yes low density is very helpful in limiting the spread, but as we have also seen, good political leadership matters more. E.g. the US despite its low population density has surprisingly high infection rate.
While high density countries in Asia such as Taiwan, South Korea, Japan, China and Vietnam have surprising low spread. A lot of that is down to great planning, preparation and high quality political leadership.
Although we have done reasonably well in Norway, I hope we will send people to Taiwan and other Asian countries to learn from them.