Add Order Notes to all WooCommerce emails

order_notes.php

<?php 

function add_order_notes($order)
{
    remove_filter('comments_clauses', array('WC_Comments', 'exclude_order_comments'));
    $args = array(
        'order' => 'DESC',
        'approve' => 'approve',
        'type' => 'order_note',
        'post_id' => 4087
    );
    $comments = get_comments($args);
    if( ! empty( $comments ) ): ?>
    <h2><?php _e('Order Notes', 'woocommerce'); ?></h2>

    <?php
    $count = 0;
    /** @var \WP_Comment $comment */
    foreach ($comments as $k => $comment) :
        $comment_meta = get_comment_meta($comment->comment_ID);
        if ( ! empty( $comment_meta ) && ! empty( $comment_meta[ 'is_customer_note' ] ) ) :
            $count++; ?>
            <table>
                <tbody>
                <tr>
                    <td>
                        <?= $comment->comment_content; ?>
                    </td>
                </tr>
                </tbody>
                <tfoot>
                <tr>
                    <td>
                        <?= __( 'Added On', 'kho-fabric' ); ?> <?= date( 'd-m-Y', strtotime( $comment->comment_date ) ); ?>
                    </td>
                </tr>
                </tfoot>
            </table>
            <?= $count > 1 ? '<hr />' : ''; ?>
        <?php endif;
        endforeach;
    endif;
    add_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_order_comments' ) );
}
add_action( 'woocommerce_email_after_order_table', 'add_order_notes', 10, 1 );