Hello there,
I hope you are doing well today.
Before making any changes you need to create a child theme and use that child theme to contain the code changes made to the theme files:
Go to Appearance > Editor > Template Parts > Content and on the 45th line you need to add the following PHP code snippet:
<?php
/* translators: used between list items, there is a space after the comma */
$categories_list = get_the_category_list( esc_html__( ', ', 'sparkling' ) );
if ( $categories_list && sparkling_categorized_blog() ) :
?>
<span class="cat-links"><i class="fa fa-folder-open-o"></i>
<?php printf( esc_html__( ' %1$s', 'sparkling' ), $categories_list ); ?>
</span>
<?php endif; // End if categories ?>
I have attached an image of how the code should look.
Best Regards,
Support