Add custom column to shop_order post type

functions.php

<?php

function add_custom_column_to_shop_order( $columns ) {
    $new_columns = is_array( $columns ) ? $columns : array();
    $new_columns['software_key'] = __( 'WhatsApp' );
    return $new_columns;
}
add_filter( 'manage_edit-shop_order_columns', 'add_custom_column_to_shop_order' );

function add_custom_column_value_to_shop_order( $column ) {
    global $post;
    if ( $column == 'software_key' ) {
        echo $post->post_status;
    }
}
add_action( 'manage_shop_order_posts_custom_column', 'add_custom_column_value_to_shop_order' );