Update. In political science, "journal articles authored exclusively by female scholars score 27% lower on average [on Altmetric Attention Scores, AAS] than exclusively male-authored outputs. However, men are also more likely to write articles with an AAS of zero. These patterns are shaped by the presence of high-scoring male 'superstars' whose research attracts much online attention."
https://link.springer.com/article/10.1057/s41304-023-00431-y
Update. "We evaluated how the #gender composition of top-cited authors within different subfields of research has evolved over timeā¦Men outnumbered women 1.88-fold among all authors, decreasing from 3.93-fold to 1.36-fold over time. Men outnumbered women 3.21-fold among top-cited authors, decreasing from 6.41-fold to 2.28-fold over time." Imbalances varied greatly by discipline.
https://www.biorxiv.org/content/10.1101/2023.05.25.542328v1