My mistake, the link in the article you first posted still shows it as a working paper and I couldn't find it with the original title when searching.
Interestingly the DOI does not show up
Here's some further criticisms:
https://www.researchsquare.com/article/rs-1073440/latest.pdf
https://arxiv.org/abs/2112.01296
https://bmcpublichealth.biomedcentral.com/articles/10.1186/s...