Sort WP Search results by date

@KA.MVP You can create hidden fields for ‘orderby’ and ‘order’ with default values ‘post_date’ and ‘desc’ or ‘asc’ in it, you can also put this form inside add_shortcode function explained below and use wherever you want to use by adding shortcode [custom_search_form]

function search_form_func()
{
    ?>
    <form method="get" action="https://www.example.com/" id="sv2">
        <input name="s" id="s" size="30" title="Search example.com" type="search" placeholder="Search example.com">
        <input type="hidden" name="orderby" value="post_date">
        <input type="hidden" name="order" value="desc">
        <input type="submit" name="submit" value="Search">
    </form>
    <?php
}
add_shortcode('custom_search_form','search_form_func');