This follows up on a December post by a different user (so perhaps the style is already being worked on?) and adds the requested information. The other post: https://forums.zotero.org/discussion/110336/looking-for-harvard-date-citation-style/p1.

Journal: Insect Conservation and Diversity
Instructions to authors: https://resjournals.onlinelibrary.wiley.com/hub/journal/17524598/homepage/forauthors.html
Online ISSN:1752-4598
Print ISSN:1752-458X

In-text citations: (Please note that for >2 authors the "et al." is italicized.)
(Campbell & Pedersen, 2007)
(Mares, 2001)

Bibliography:
Campbell, J.L. & Pedersen, O.K. (2007) The varieties of capitalism and hybrid success. Comparative Political Studies, 40, 307-332.
Mares, I. (2001) Firms and the welfare state: When, why, and how does social policy matter to employers? Varieties of Capitalism: The Institutional Foundations of Comparative Advantage (ed. by Hall, P.A. & Soskice, D.), pp. 184-213. Oxford University Press, New York.

Thanks!