Businesses are coming back but through the new normal. But for those countries like New Zealand and Taiwan, there's nothing have changed. They've been back in their normal lives or at least they didn't tackled much with covid19.
These are few countries that you have mentioned that didn't feel much challenge with covid-19 and also some African countries didn't fall much in the pandemic but apart from that, it was a very big issue to most countries and they are just coming back from it, trying to rebuild their losses.
It is not actually they don't feel the challenge of covid-19,
They just have the best solution in times like this. Instead of panicking and questioning the decision of their government, the people on the said country have followed the guidelines and rules of the government to avoid this covid-19 to increase the numbers of affected in their country. They just solved the problem or we can easily say that they are prepared in times like this unlike in other countries.