Unfortunately covid deaths are highly unreliable as there is lots of evidence worldwide that people dying with covid are also counted with those dying of covid. Also lots of cases of dead people being counted while not being tested or positively tested for covid.
That's exactly why I like the link I posted. It tries to provide context on how many people die with covid, flu, pneumonia, or some combination of the 3.
Then more importantly, it looks at the overall death rate. Because even if you completely ignore the covid count, the fact that there are so many more people dying than normal should grab people's attention.
How do you think flu deaths are counted? Because that numbers shows also estimated death people - people who were never even tested on flu. Like, percentage of pneumonia deaths. And they contain also people also having other health issues and not just flu.
Flu deaths are counted as the number of people who die because of the flu - that is, they represent people who wouldn't have died if they didn't catch the flu. This is of course an estimate, and there are some pretty fundamental reasons why it has to be such as the fact that flu causes heart attacks and strokes but also just happens to be present in patients who have one for unrelated reasons, but it should be a pretty robust one because flu is an old and well researched disease and we have a vey good idea of how it behaves at a population level.