[ceejayoz]

That sort of thing is relatively trivial to tease out of the stats, because in addition to excess deaths we have per-disease statistics as well.

See the chart about 2/3 down on https://www.healthsystemtracker.org/brief/covid-19-continues..., titled "Average daily deaths in the United States, by cause (2020 - Present)". We don't see a massive spike in other causes of death (including cancer, which is a flat line at ~1,600/day throughout), and no one's likely to misidentify a cancer or heart attack death on a death certificate.

There are certainly cases like your dad's, where delayed screenings and treatment had individual impacts, but none of the stats available to us show this explaining a meaningful amount of the 1.3M excess deaths observed.