Yeah , population is huge there in Pakistan and covid has put the people's life in trouble. You can take an example of Australia, though population is not much there , there were 1-2 cases daily and the government announced a week long lovkdown. So with low population, it's becomes easy to control the spread of covid.Covid is also spreading in here in Pakistan because Pakistan is also a densely populated country. I think countries with low population and with a low interaction rate are the ones where Covid-19 does not spread a lot and there are some countries like that in the world where people do not actually interatct with each other that much.