The US CDC (Centres for Disease Control) has just published data on their website, which shows the true cause of death of all those that have been recorded as COVID19 deaths in the US. As of 26 August 2020 they list 161,392 deaths. That list is broken down into those who died directly from COVID19 disease and those who died with COVID19, because they had other comorbidities (they were already sick with other diseases).
In this regard the CDC wrote the following:
Table 3 shows the types of health conditions and contributing causes mentioned in conjunction with deaths involving coronavirus disease 2019 (COVID-19). For 6% of the deaths, COVID-19 was the only cause mentioned. For deaths with conditions or causes in addition to COVID-19, on average, there were 2.6 additional conditions or causes per death. The number of deaths with each condition or cause is shown for all deaths and by age groups. (emphasis added)
Table 3 breaks down all the other health conditions people had. These other conditions include respiratory diseases like influenza and pneumonia, as well as circulatory diseases, like heart problems, heart attacks etc.