You can grant other user roles access to the Facebook Feed plugin settings and the ability to manage feeds by using a plugin such as User Role Editor and giving a role the cff_settings_pages_capability .
You can also do this without the need for an additional plugin by adding the following PHP code snippet to the functions.php file of your active theme. This will give users with the Editor role the ability to manage the plugin settings and feeds.
function sb_custom_capability( $cap ) {
return 'edit_posts';
}
add_filter( 'cff_settings_pages_capability', 'sb_custom_capability', 10, 1 );