While testing the v2.0 preview of a category index page in our Help Centre, both WAVE and Accessibility Insights for Web noted several instances of "empty" buttons that did not have the button-name attribute. These were associated with the article titles.

This is a WCAG 4.1.2 error. (https://www.w3.org/WAI/WCAG21/Understanding/name-role-value.html)

I've attached a few screenshots.