Unfortunately, it is hard to get those numbers correctly. COVID patients die because of multiple organ failure and unless the deceased was already tested and verified for it, you can't attribute the death to COVID officially. A lot of people pass away without showing visible symptoms or without realizing they need immediate medical attention for COVID.
It would be good to have that attribution and that will require testing the deceased, but given the load on the system, everybody can extrapolate the scale and act accordingly.
Exactly the point I am making. You can do the analysis and determine the scale but you can't change the official COVID numbers.
In fact, that is even the link you shared shows. It compared the overall death rate with the official COVID numbers and proved the numbers are conservative, in US. Of course.
It would be good to have that attribution and that will require testing the deceased, but given the load on the system, everybody can extrapolate the scale and act accordingly.