In Stock Notifications Magento 2

Hi

Am using the community copy of Magento 2 platform. Was interested in setting up In stock notifications for customers who enter their e-mail on a product page. I see there is a way to allow this with having all of the products which are out of stock visible in the categories but is there a way to have the OOS remain invisible from the site unless they enter directly from a URL (such as they found the product in google and clicked on the Search engine result)?

Many thanks