Though likely a much smaller impact than other factors such as cross-immunity from previous HCoV epidemics such as SARS and MERS.

There are no studies which have found statistically significant links between political measures and excess COVID deaths.

From the conclusions section:

“Regarding government's actions (i.e., containment and stringency index), no association was found with the outcome, suggesting that the other studied factors were more important in the Covid-19 mortality than political measures implemented to fight the virus, except for the economic support index.”