Hello,

I am glad that you found the author box. About the social share I have seen your site single post page. The social share already shown at the bottom of you post pages:

Screenshot for clarification: https://jmp.sh/U1CjhEl

If you expect that there are some social profiles for that specific author, then there is no such option currently in the theme. Only social share is available to share your posts on different other social platforms.

Best Regards.