WordPress: Search template using Search WP custom query

search.php

<?php

/**
 * Search results
 * 
 * Example of a custom query using Search WP. Note this only needed if you need a custom query.
 */

get_header();

$swp_query = new SWP_Query([
    's'      => get_search_query(),
    'engine' => 'default',
]);
?>

<?php if ($swp_query->have_posts()) : ?>

    <?= esc_html($wp_query->found_posts) ?> results found for <span>"<?= esc_html(get_search_query()) ?>"</span>

    <?php the_posts_pagination(); ?>

    <?php while ($swp_query->have_posts()) : ?>

        <?php
        $swp_query->the_post();
        $search_result_excerpt = get_the_excerpt();
        ?>

        <a href="<?php the_permalink(); ?>" class="">
            <?php the_title(); ?>
        </a>

        <?php if ($search_result_excerpt) : ?>
            <?= $search_result_excerpt ?>
        <?php endif; ?>

        <a href="<?php the_permalink() ?>" class="">
            <?php the_permalink() ?>
        </a>

    <?php endwhile; ?>

    <?php wp_reset_postdata(); ?>

    <?php the_posts_pagination(); ?>

<?php else : ?>

    No results found for <span>"<?php echo esc_html(get_search_query()) ?>"</span>.

<?php endif; ?>

<?php get_footer(); ?>