Cartzilla - Single Product Custom "Released" Date

functions.php

if( ! function_exists( 'cartzilla_wc_product_publish_date' ) ) {
    function cartzilla_wc_product_publish_date() { 
    global $product;

    $released_date = get_post_meta( $product->get_id(), 'released_date', true );
    ?>
    <li class="d-flex justify-content-between mb-3 pb-3 border-bottom">
    <span class="text-dark font-weight-medium"><?php echo esc_html('Released', 'cartzilla'); ?></span>
    <span class="text-muted"><?php echo date( 'F j, Y', strtotime( $released_date ) ); ?></span></li><?php
    }
}