Meta Box

add_filter( 'rwmb_meta_boxes', 'your_prefix_register_meta_boxes' );

function your_prefix_register_meta_boxes( $meta_boxes ) {
    $prefix = '';

    $meta_boxes[] = array (
        'title' => esc_html__( 'Server Specifications', 'text-domain' ),
        'id' => 'server-specifications',
        'post_types' => array(
            0 => 'dedicated-server',
        ),
        'context' => 'after_title',
        'priority' => 'high',
        'fields' => array(
            array (
                'id' => $prefix . 'cpu_model_06x5z89bthw',
                'type' => 'post',
                'name' => esc_html__( 'CPU Model', 'text-domain' ),
                'post_type' => array(
                    0 => 'cpu',
                ),
                'field_type' => 'select_advanced',
                'required' => 1,
                'after' => '<div class="addon-link">&raquo; &nbsp;<a href="post-new.php?post_type=cpu">Add new CPU</a></div>',
            ),
            array (
                'id' => $prefix . 'ram_rpvl3tynznp',
                'type' => 'post',
                'name' => esc_html__( 'RAM', 'text-domain' ),
                'post_type' => array(
                    0 => 'ram',
                ),
                'field_type' => 'select',
                'query_args' => array(
                    'order' => 'ASC',
                ),
                'required' => 1,
                'after' => '<div class="addon-link">&raquo; &nbsp;<a href="post-new.php?post_type=ram">Add new RAM</a></div>',
            ),
            array (
                'id' => $prefix . 'drives_046wdfgugzub',
                'type' => 'post',
                'name' => esc_html__( 'Drives', 'text-domain' ),
                'post_type' => array(
                    0 => 'drive',
                ),
                'field_type' => 'select_advanced',
                'required' => 1,
                'after' => '<div class="addon-link">&raquo; &nbsp;<a href="post-new.php?post_type=drive">Add new drive</a></div>',
                'multiple' => true,
            ),
            array (
                'id' => $prefix . 'price_14ab48oth3ih',
                'type' => 'text',
                'name' => esc_html__( 'Price', 'text-domain' ),
                'desc' => esc_html__( 'Currency sign is not required', 'text-domain' ),
                'placeholder' => esc_html__( 'xxx.xx', 'text-domain' ),
                'required' => 1,
                'label_description' => esc_html__( 'Regular price', 'text-domain' ),
            ),
            array (
                'id' => $prefix . 'featured_aaljhych5q',
                'type' => 'switch',
                'name' => esc_html__( 'Featured', 'text-domain' ),
                'style' => 'rounded',
                'on_label' => 'Yes',
                'off_label' => 'No',
                'label_description' => esc_html__( 'Whether item is featured', 'text-domain' ),
            ),
            array (
                'id' => $prefix . 'onsale_pn2jn0x6aw',
                'type' => 'switch',
                'name' => esc_html__( 'On Sale', 'text-domain' ),
                'style' => 'rounded',
                'on_label' => 'Yes',
                'off_label' => 'No',
                'label_description' => esc_html__( 'Whether item is on sale or discounted', 'text-domain' ),
            ),
            array (
                'id' => $prefix . 'discounted_ye8xr7m539i',
                'type' => 'text',
                'name' => esc_html__( 'Discounted Price', 'text-domain' ),
                'placeholder' => esc_html__( 'xxx.xx', 'text-domain' ),
                'label_description' => esc_html__( 'Price after discount', 'text-domain' ),
                'visible' => array(
                    'when' => array(
                        array (
                            0 => 'onsale_pn2jn0x6aw',
                            1 => '=',
                            2 => 1,
                        ),
                    ),
                    'relation' => 'and',
                ),
            ),
            array (
                'id' => $prefix . 'recommended_63mxmfmup4t',
                'type' => 'switch',
                'name' => esc_html__( 'Recommended', 'text-domain' ),
                'style' => 'rounded',
                'on_label' => 'Yes',
                'off_label' => 'No',
                'label_description' => esc_html__( 'For home page', 'text-domain' ),
            ),
            array (
                'id' => $prefix . 'order_url_3hdpmvlrlhd',
                'type' => 'url',
                'name' => esc_html__( 'Order URL', 'text-domain' ),
                'placeholder' => esc_html__( 'https://yourdomain.com/?url=something', 'text-domain' ),
                'required' => 1,
            ),
        ),
    );

    return $meta_boxes;
}

Actually it's not just select_advanced, but also the one that using select

if( is_home() && is_front_page() ) {
    // The Query
    $the_query = new WP_Query( array( 'post_type' => 'dedicated-server', 'posts_per_page' => 1 ) );

    // The Loop
    if ( $the_query->have_posts() ) {
       
        while ( $the_query->have_posts() ) {
            
            $the_query->the_post();

            $recommend  = rwmb_meta('recommended_63mxmfmup4t');
            
            if($recommend == 1 || $recommend == 'Yes') {
                ?>
<?php 
<!--- other tags ... -->

<h5 class="h5-z5-1"><?php rwmb_the_value('cpu_model_06x5z89bthw');?>

<!--- other tags ... -->
<?php

            }
        }        
    } else {
        // no posts found
    }
    /* Restore original Post Data */
    wp_reset_postdata();
}

?>