We've gone through this before, and there are no good numbers to work with. I'll try to sum it up.
The issue with confirmed cases starts with our numbers in the US. We know most people with the virus didn't get tested. We also know that the accuracy of the tests has been reported to be as low as 50-60%. Both os these things are leading to greatly underreported confirmed cases here. To then compare our inaccurate numbers to those of other countries, who are administrating different tests in different ways and have a plethora of their own issues... let's just say it's very far from scientific.
Deaths are a little more accurate, but not by much. There are 2 main issues with comparing US deaths with other countries. The first is accuracy. The US has pretty accurate statistics on deaths, even those at home, but they aren't complete. While some other countries also have accurate death records, they are a tiny minority. Most countries don't have the infrastructure to report accurately on a good day, and definitely not during a crisis. The second issue with death numbers is that each country has their own standard for what they consider a Covid-19 related death. The US has the broadest definition. If you die in the US and Covid-19 is a factor, you count. Cancer, heart attack, kidney issue, degenerative disease - doesn't matter. If covid-19 played any kind of part, it counts. Other countries have a very wide variety of definitions, and they are more likely to have narrower criteria.
In other words, to do a comparative study, you need to compare apples to apples. We don't even know how many apples we have to compare to their oranges, cherries, or bananas.