For more details see the Wishlist for Magento 2 extension page.
This tool collects data from all users' wishlists and shows which items were added the most frequently. Keep a close watch on what your customers demand and easily manage your products' popularity.
To configure the extension, go to: Content → Whishlist
Stock Qty - see how many items left in stock.
Count - see how many times the item was added to the wishlist.
Action (Edit) - you'll get to the product editing page: