Checking the custom post type mapped capabilities while in development stage.

functions.php

<?php

// FOR DEVELOPMENT PURPOSES, create a submenu page that displays the capabilities of
// Custom Post Type which is called Topic and this page is only available to ADMINS
add_action('admin_menu', 'mpons_forum_submenu');
function mpons_forum_submenu() {
    add_submenu_page(
        'tools.php',
        __('Media Pons Topic CPT', 'media-pons-forum'),
        __('Media Pons Topic CPT', 'media-pons-forum'),
        'manage_options',
        'media-pons-topic-cpt',
        'media_pons_render_topic_cpt'
    );
}

function media_pons_render_topic_cpt() {
    $topic = $GLOBALS['wp_post_types']['topic'];
    ?>
    <div class="wrap" id="media-pons-cpt-admin">
        <h1>Topic</h1>
        <pre><?php print_r(['capability_type' => $topic->capability_type]) ?></pre>
        <pre><?php print_r(['map_meta_cap' => $topic->map_meta_cap]) ?></pre>
        <pre><?php print_r(['cap' => $topic->cap]) ?></pre>
        <pre><?php print_r($topic) ?></pre>
    </div>
    <?php
}