Correct. An autopsy is needed to see the entire effects of the 'clot shot's for a cause of death. Excess Deaths measure the change of the rate of dying in our populations.
Did you notice the 3 waves of increasing deaths as the CoVID 'vaccines' were rolled out?
Yes.
Deaths inceased with time
vaccinations increased with time.
COVID cases increased with time.
But as you say only autopsies can assign the cause.