[custom admin column]

functions.php

add_filter('manage_<POSTTYPE>_posts_columns', function ($columns) {
    return array_merge($columns, ['verified' => __('Verified', 'textdomain')]);
});

add_action('manage_<POSTTYPE>_posts_custom_column', function ($column_key, $post_id) {
    if ($column_key == 'verified') {
        $verified = get_post_meta($post_id, 'verified', true);
        if ($verified) {
            echo '<span style="color:green;">';
            _e('Yes', 'textdomain');
            echo '</span>';
        } else {
            echo '<span style="color:red;">';
            _e('No', 'textdomain');
            echo '</span>';
        }
    }
}, 10, 2);