Where did the "Cited by" link go on Google search results?
I don't know if it can be re-enabled (seems unlikely), but a workaround could be to use the Google Scholar button* browser extension (Firefox, Chrome). You can select the title of the paper, then click the button to see its search results on Google Scholar, including a clickable &quot;Cited by&quot; button. Alternatively, you could directly press the button if the title is already present in your Google search terms. It is not as convenient as having the link directly in the search results, but is still easier than separately opening Google Scholar, in my opinion.
Screenshot for reference:

*No affiliation