Adding an Options Page to a CPT in ACF PRO V5

// The whole idea is to set the parent_slug to 'edit.php?post_type=cpt-name
// Everything else you can customize as you need to. 
// Replace {posttype} with your post type name. (Without the brackets of course)

  ${posttype}_options_page = acf_add_options_page(array(
      'page_title' => '{posttype} Options',
      'menu_title' => '{posttype} Options',
      'menu_slug' => 'acf-cpt-{posttype}',
      'capability' => 'edit_posts',
      'position' => false,
      'parent_slug' => 'edit.php?post_type={posttype}',
      'icon_url' => false,
      'redirect' => false,
      'post_id' => '{posttype}_options',
      'autoload' => false
    ));

https://github.com/Tusko/ACF-CPT-Options-Pages