Woocommerce frontend edit custom fields

you don’t have to edit the order-details.php page the woocommerce_order_details_after_order_table action will achieve the same results.

add_action( 'woocommerce_order_details_after_order_table',
            'namespace\custom_field_display_cust_order_meta', 10, 1 );

function custom_field_display_cust_order_meta( $order ) {
  echo '<form [whatever]>';
  /* translators: whatever */
  echo '<p>' . sprintf( __( '<strong>Property 1:</strong> %1$s (%2$s)' ),                                                                                                                                  
                        '<input [whatever]>'
                        . get_post_meta( $order->get_order_number(),
                                         'property 1.1', true )
                        . '</input>',
                        '<input [whatever]>'
                        . get_post_meta( $order->get_order_number(),
                                         'property 1.2', true )
                        . '</input>' )
       . '</p>';
  echo '[whatever]';
  echo '</form>';
}