Altered BusinessBloomer snippet to make phone field required for shipping address, as well as moving it to make it conform to billing address location

bbloomer_shipping_phone_checkout.php

<?php

/**
 * @snippet       Shipping Phone & Email - WooCommerce
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 3.6.4
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */
 
add_filter( 'woocommerce_checkout_fields', 'bbloomer_shipping_phone_checkout' );
 
function bbloomer_shipping_phone_checkout( $fields ) {
   $fields['shipping']['shipping_phone'] = array(
      'label' => 'Phone',
      'required' => true, //changed
      'class' => array( 'form-row-wide' ),
      'priority' => 100, //changed
   );
   return $fields;
}
  
add_action( 'woocommerce_admin_order_data_after_shipping_address', 'bbloomer_shipping_phone_checkout_display' );
 
function bbloomer_shipping_phone_checkout_display( $order ){
    echo '<p><b>Shipping Phone:</b> ' . get_post_meta( $order->get_id(), '_shipping_phone', true ) . '</p>';
}