Two, Walter R. Mebane, an expert on election fraud, had a response to that paper: https://www.cambridge.org/core/journals/political-analysis/a...
And three, Mebane also released a short paper reviewing the 2020 results: http://www-personal.umich.edu/~wmebane/inapB.pdf
tl;dr: There are very minor anomalies in some numbers but either way we have to wait till we get the final numbers in before we can do real analysis.