gistfile1.txt

/**
 * @snippet       Shipping Phone in WooCommerce Checkout
 * @author        Ncy Design https://wordpress.ncy.design
 * @compatible    WooCommerce 3.7.0
 */
 
add_filter( 'woocommerce_checkout_fields', 'ncydesign_shipping_phone_checkout' );
 
function ncydesign_shipping_phone_checkout( $fields ) {
   $fields['shipping']['shipping_phone'] = array(
      'label' => 'Phone',
      'required' => false,
      'class' => array( 'form-row-wide' ),
      'priority' => 25,
   );
   return $fields;
}
  
add_action( 'woocommerce_admin_order_data_after_shipping_address', 'ncydesign_shipping_phone_checkout_display' );
 
function ncydesign_shipping_phone_checkout_display( $order ){
    echo '<p><b>Shipping Phone:</b> ' . get_post_meta( $order->get_id(), '_shipping_phone', true ) . '</p>';
}