leanderlindahl

This plugin will create an authorbox widget that you can place in a sidebar. The widget displays the users gravatar, biographical info and icons linking to Facebook, Twitter, LinkedIn and Google Plus.
Edit the users profile page and provide the necessary information. The social media links should be full URL:s, i e 
http://www.facebook.com/joe-smith 
http://www.twitter.com/joe-smith

Social Author Box

Creates an "Author Box" Widget with the author's picture, bio and social media links.

Jon Bishop

Display beautifully styled author bios below your posts with full control over layout, design, and social links. WP About Author integrates seamlessly with WordPress profiles and works instantly with minimal setup.
Features include:
<ol>
<li>Multiple layout styles including left, right, and centered designs</li>
<li>Border and background options to match your site’s theme</li>
<li>Custom avatar sizing and optional circular display</li>
<li>Toggle display on posts, pages, archives, search results, and more</li>
<li>Choose between text or SVG icon social links for 20+ services</li>
</ol>
The plugin also adds additional fields to user profiles for platforms like GitHub, LinkedIn, Threads, TikTok, YouTube, and more making it easy for readers to connect with your authors.

WP About Author

Easily display customizable author bios below your posts

Social Author Box vs WP About Author