According to Google, These Are Not Good Signals

The subject of whether Google would reinstate authorship signals was posed. Because Google encourages SEOs and site owners to read the Search Quality Raters Guidelines to learn what Google wants to rank, authorship has become a focus for some SEOs. Instead, SEOs began to study the paper for suggestions for ranking signals, taking the encouragement too literally.
The assumption that authorship signals were significant for ranking originated when digital marketers began to see the concept of EEAT (Expertise, Experience, Authoritativeness, and Trustworthiness) as real signals that Google's algorithms were looking for.
Since Google formerly developed a mechanism for website owners and SEOs to share metadata about webpage authorship, the concept of authorship signals is not implausible. However, Google eventually gave up on the project.

Markup Managed by SEO Is Reliable
When asked about authorship signals, Google's Gary Illyes responded right away, stating in one line that the company's experience with SEO-controlled markup on web pages tends to become spammy (implying that it's untrustworthy).

Google did not promote the notion that "authorship signals" are important for ranking; rather, several SEOs came up with it on their own. For years, Google employees like John Mueller and Search Liaison have continuously minimized the importance of author biographies.