Hi!
1. I logged in via FTP, and the bbpress theme had a separate search form file, so I was able to make a replica of it then added the search shortcode into the child theme folder: \wp-content\themes\aardvark-child\bbpress\form-search.php
Now you should be seeing the plugin search bar instead of the default bbpress search form.
2. It is there as ‘Curvy black vertical’, if you scroll down a bit, you should be able to see it: https://i.imgur.com/V6x3LTY.png
