src/lib/Breadcrumbs.php
protected function add_post_type_archive_links()
    {
        $post_type = \get_query_var('post_type');
        $post_type_link = (\get_post_type_archive_link($post_type) ?: '');
        $post_type_label = \post_type_archive_title('', false);

        $this->links[] = $this->currentLink($post_type_label, $post_type_link);
    }
protected function add_post_type_archive_links()
    {
        $post_type = \get_query_var('post_type');
        $post_type_link = (\get_post_type_archive_link($post_type) ?: '');
        $post_type_label = \post_type_archive_title('', false);

        $this->links[] = $this->currentLink($post_type_label, $post_type_link);
    }
Called if $page === 'post_type_archive'