What happens if someone clicks on a direct link to a password protected product?
If someone clicks on a direct link to a product in a WooCommerce password protected category – for example because they know the URL or you have ticked the option to show protected products in public parts of your site – then they will be shown the category login form. They must enter a correct password in order to view the product.
Before entering the password, they will not be able to see the product content within such as the description, images or price. Depending on your theme, they may be able to see the title. In the below example, you can see the product title in the breadcrumb trail but the actual product is protected.