Hi @mytsolutions,
That unfortunately isn’t the entirety of what you’ll need to get social icons from FontAwesome to show up. Had you seen this doc yet? It is semi related and with some modification to the CSS could work with HTML widgets.
https://docs.woocommerce.com/document/create-a-social-icon-menu/
The important part is that you have a link, either in your HTML widget or a menu widget, that adds the URL to Facebook. I’m assuming this would be a Facebook page, but as long as the URL starts with facebook.com/ it’ll work. This is what the CSS in that doc uses to make the social icon show up.
Nonetheless, like mentioned I would create a social menu for your sidebar and add your social media links there. Or if you have just one, write the html code to create a text link to Facebook. Then modify the Facebook CSS in that doc to work/target the correct area of your site and theme.
Let me know if any of that makes sense. I have this setup on my own test site to target the secondary menu, but that CSS can be changed as needed.
Link to image: https://cld.wthms.co/YeLXyr