While there is now an unambiguously clear partisan gap on coronavirus deaths due to the unvaccinated, I'm not sure if it necessarily had a meaningful impact on the election.
We aren't talking about that many people in terms of the size of the electorate, even if it is a large body count in absolute terms. And that body count is fairly distributed across the electorate. We had at least 103 million people vote in the Midterms.
I think the argument has more substance for some of the close state legislature races. We had a few races come down to a handful of votes.
I don't think there is any chance it meaningfully changed the House. The closest race as of now is Boebert's with a lead of only ~1k votes. That could potentially narrow more. Pueblo county had 800 coronavirus deaths. Mesa county had 600 coronavirus deaths.
I don't think there is any chance it meaningfully changed the Senate. The closest Senate races were Georgia and Nevada. Walker fell short of preventing a runoff by about ~60k votes. Georgia has had a total of ~39k confirmed coronavirus deaths. Laxalt fell short of winning by about ~9k votes, and Nevada has had a total of ~11k confirmed coronavirus deaths.