how about I quote directly from your source?

”Excess deaths not attributed to Covid-19 could reflect either immediate or delayed mortality from undocumented COVID-19 or Non-COVID-19 deaths as the secondary to the pandemic, such as from DELAYED care or BEHAVIORAL health crisis. Death rates from several non-COVID diseases (eg, heart disease, Alzheimer’s disease) increased during surges *LOCKDOWNS*. The mode does NOT adjust directly for population aging, which could contribute to an over estimate of excess deaths. Other study limitations include reliance on provisional data, inaccurate death certificates, and modeling assumptions.”

Using excess deaths is at best a pseudodata approach because it takes ALL excess deaths. Remember the lockdowns when people couldn’t or wouldn’t go to the doctor? Did you also know that it doesn’t just take into account t for diseases?