Again, the virus wasn't spread nearly as much nationwide in Feb 2021, so you're not comparing the same thing. We didn't reach 50k daily cases until late June 2020. In 2021, we've averaged over 87k cases per day. There have been significantly more cases since Feb 2021 until now than there were from Feb 2020 to Dec 21 2021. From Feb - Dec 21 2020 we had 18,635,665 confirmed cases. From Feb 21 2021 til now we have had 23,193,609 cases (and we're not testing nearly as much as we were in 2020). So 4.5 million more confirmed cases. And this doesn't quite tell the entire story since deaths lag roughly 1 month behind cases. So deaths you're seeing in Feb 2021 were from confirmed cases in Dec../January.
You're comparing apples and oranges.