YITH Wishlist plugin

Your customers can browse through your store and add items to list to compile an itemization of goods or services they desire.

Firstly create WishList page if it's not created yet using the following shortcode - [yith_wcwl_wishlist]

Go to YITH > WishList and select "After "Add to cart"" for Position option

YITH > Wishlist > Add to wishlist options > 

Other settings you may adjust at your option - https://docs.yithemes.com/yith-woocommerce-wishlist/.