Author page doesn't seem to be functioning in Supreme

Forgive me if I’m missing something. I’m not sure what the author page is supposed to look like and how it is intended to function, but currently, there is not much there.

From the My Account drop down that reaches author-page.

1. How can user change their profile picture. Doesn’t seem to be a way to do that from front end.
2. Is there any room for an about the author? Don’t see that.

3. The Listings don’t show up, just a link to listings. Any way to show their actual listings.

4. Their invoices don’t show up. Any way to show their invoices?

5. The background image is stock. Any way for them to set their own background image?

I don’t see that anything I do in Design/Author effects the page.

Thanks for your help.