Sidebar Question

Hello,

I have a sidebar that populates links to subpages (as seen on this page): https://pacasatesting.site/about-pa-casa/

Some pages, however, do not have any subpages. In replacement of the sidebar, I would like to show a social media feed from Facebook. I have the code from Facebook already. Here is an example of a page w/o the need for the sidebar links: https://pacasatesting.site/news.php

How would I go about handling this? Both pages use the same template.