Using Shortcodes in a Module
Shortcodes can be also used in Joomla modules, but since they are loaded from a plugin, the module needed "Prepare Content" enabled for the shortcode to work.
In the module Option tab, select Yes on Prepare Content.
Note: Some third-party modules don't support the "Prepare Content" option.
Take me to Joomla Content Shortcodes for FontAwesome