YITH WooCommerce Wishlist is a plugin that allows your customers to arrange the products they are interested in one or more wishlists. This process allows them to check these products back again at a later moment and eventually proceed to purchase them.
Thanks to the integration between the premium version of the plugins it will be possible to add a slider to the wishlist page showing products that are frequently bought together with the wishlist items.
Once you have activated both plugins, a new menu will appear within the Frequently Bought Together plugin settings > ‘Slider in wishlist’.

Here you can change the title of the slider, the number of products to show, and what product information to show within the slider.
On the wishlist page you will see the slider with linked products and the added options.

For more information about setting up the wishlist plugin, check out the complete documentation here.