You mean like this https://www.science.org/doi/10.1126/sciadv.aef5697, or this https://pmc.ncbi.nlm.nih.gov/articles/PMC8354557/.

Yes, but at a significantly higher level of magnitude. Their official count is 122,398; the US reported 1,238,123. Both are undercounts, but China's is probably much more of an undercount.