That seems made up, do you have a credible source for that?
In many places in the United States it was unusual for COVID to be listed as a cause of death in paperwork. Often it was listed a something coronary or pulmonary. This isn't unique to COVID, but happened a lot more with that disease, especially before there were vaccines and the stigma was stronger.
The actual number of COVID deaths is estimated because policies varied so much among different political jurisdictions.
Source: Work in the healthcare industry, and had relatives die of COVID who ended up with something else listed on their death certificates.
There's still plenty of people who don't believe 1,100,000 Americans died of COVID. These same people also wonder why it suddenly became harder to find workers.