WooCommerce - Add Shipping Phone

<?php
// WooCommerce - Add Shipping Phone
add_filter( 'woocommerce_checkout_fields', 'add_shipping_phone_to_checkout' );
function add_shipping_phone_to_checkout( $fields ) {
  $fields['shipping']['shipping_phone'] = array(
    'label'        => 'Phone for delivery',
    'placeholder'  => 'Phone for delivery',
    'required'     => 1,
    'type'         => 'tel',
    'class'        => array( 'form-row-wide' ),
    'validate'     => array( 'phone' ),
    'priority'     => 100
  );
  return $fields;
}

add_action( 'woocommerce_new_order', 'add_shipping_phone_to_order' );
function add_shipping_phone_to_order( $order_id ) {
  $shipping_phone = isset( $_POST['shipping_phone'] ) ? $_POST['shipping_phone'] : 'Not set';
  add_post_meta( $order_id, 'shipping_phone', $shipping_phone, true );
} // end function

add_filter( 'woocommerce_email_order_meta_fields', 'custom_woocommerce_email_order_meta_fields', 10, 3 );
function custom_woocommerce_email_order_meta_fields( $fields, $sent_to_admin, $order ) {
  $fields['shipping_phone'] = array(
   'label' => 'Shipping Phone',
   'value' => get_post_meta( $order->get_id(), 'shipping_phone', true ),
  );
  return $fields;
}

add_action( 'woocommerce_admin_order_data_after_shipping_address', 'bbloomer_shipping_phone_checkout_display' );
function bbloomer_shipping_phone_checkout_display( $order ){
  print '<p><b>Shipping Phone:</b> ' . get_post_meta( $order->get_id(), 'shipping_phone', true ) . '</p>';
}