displaying all the data center menu on the data center page. does a page search and walks through it

data-center-display-functions.php

<?php
function display_data_centers( $atts, $content ) {
    $values = shortcode_atts( array(
        // not being used, is in the CSS
        // 'columns' => $atts[ 'columns' ], 
    ), $atts );

    $html = '<div class="data-center-links auto"><div>';
    $state_pages = get_pages( [
        'parent' => 93,
        'sort_order' => 'ASC',
        'sort_column' => 'post_name'
    ] );
    foreach( $state_pages as $state ) {
        $html .= '<h4>' . $state->post_title . '</h4><ul>';
        $city_pages = get_pages( [
            'parent' => $state->ID,
            'sort_order' => 'ASC',
            'sort_column' => 'post_name'
        ] );
        foreach( $city_pages as $city ) {
            $html .= '<li><a href="' . get_permalink( $city->ID ) . '">' . $city->post_title . '</a></li>';
        }
        $html .= '</ul>';
        if( $state->post_title == 'Maryland' || $state->post_title == 'New York' || $state->post_title == 'Pennsylvania' || $state->post_title == 'Wisconsin' ) {
            if( $state->post_title != 'Wisconsin' ) {
                $html .= '</div><div>';
            } else {
                $html .= '</div>';
            }

        }
    }
    $html .= '</div>';
    return $html;

}
add_shortcode( 'display_data_centers', 'display_data_centers' );