Add new fields to WC admin Page Setup

function.php

<?php
// Admin -> WC -> Settings -> Advanced -> Page Setup

add_filter( 'woocommerce_settings_pages' , 'add_new_woocommerce_settings_pages' );
function add_new_woocommerce_settings_pages( $settings ){
  $new_pages = array();

  foreach( $settings as $s ){
      if( $s['id'] == 'advanced_page_options' ){
          $new_pages[] = array(
              'title'    => __( 'Registration page', 'woocommerce' ),
              'id'       => 'woocommerce_registration_page',
              'type'     => 'single_select_page_with_search',
              'default'  => '',
              'class'    => 'wc-page-search',
              'css'      => 'min-width:300px;',
              'args'     => array(
                  'exclude' =>
                      array(
                          wc_get_page_id( 'checkout' ),
                          wc_get_page_id( 'myaccount' ),
                          wc_get_page_id( 'cart' ),
                      ),
              ),
              'desc_tip' => false,
              'autoload' => false,
          );

          $new_pages[] = array(
              'title'    => __( 'Reports page', 'woocommerce' ),
              'id'       => 'woocommerce_reports_page',
              'desc'     => 'Page contents: <br>[efp_reports]',
              'type'     => 'single_select_page_with_search',
              'default'  => '',
              'class'    => 'wc-page-search',
              'css'      => 'min-width:300px;',
              'args'     => array(
                  'exclude' =>
                      array(
                          wc_get_page_id( 'checkout' ),
                          wc_get_page_id( 'myaccount' ),
                          wc_get_page_id( 'cart' ),
                      ),
              ),
              'desc_tip' => true,
              'autoload' => false,
          );

          break;
      }
  }

  // move newly added array elements to different position inside array
  array_splice( $settings, 1, 0, $new_pages );

  return $settings;
}