Extra Trending post change to Latest

Latest.php

<?php $args = array( 
        'numberposts' => '1', 
    );
    $recent_posts = wp_get_recent_posts( $args );
    foreach( $recent_posts as $recent ):

    $post_id        = $recent['ID'];
    $post_url       = get_permalink($recent['ID']);
    $post_title     = $recent['post_title'];
    $post_content   = $recent['post_content'];
    $post_thumbnail = get_the_post_thumbnail($recent['ID']);

    endforeach; 
    
    echo '<div class="et-trending-post et-trending-latest"><a href="'.$post_url.'">'.$post_title.'</a></div>';
    ?>

Original.php

	<?php if ( $header_vars['trending_posts']->have_posts() ) : ?>
									<?php
									$trending_post_count = 0;
									while ( $header_vars['trending_posts']->have_posts() ) : $header_vars['trending_posts']->the_post();

										$trending_post_latest_class = $trending_post_count == 0 ? 'et-trending-latest' : '';

										$trending_post_classes = extra_classes( array( 'et-trending-post', $trending_post_latest_class ), 'et-trending-post', false );
									?>
										<div id="et-trending-post-<?php the_ID(); ?>" class="<?php echo esc_attr( $trending_post_classes ); ?>">
											<a href="<?php the_permalink(); ?>"><?php echo esc_html( truncate_title( 55 ) ); ?></a>
										</div>
									<?php
										$trending_post_count++;
									endwhile;

									wp_reset_postdata();
									?>
								<?php else : ?>
									<div id="et-trending-post-sample" class="et-trending-post et-trending-latest">
										<a href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php esc_html_e( 'Sample Post Title', 'extra' ); ?></a>
									</div>
								<?php endif; ?>

Just wondering, can this code be used in a Divi Child theme? If so, where is it dropped, in the functions.php? Is there are shortcode that can be used to insert it into a Divi Text module?