To display the wishlist icon before the add to cart button on the product page, use the following CSS in theDivi theme options.

.dfw-32-add-to-cart .woocommerce-variation-add-to-cart {
    display: flex;
}

.dfw-32-add-to-cart .woocommerce-variation-add-to-cart .dwe_wishlist_button_wrapper {
    margin-right: 20px;
}

Replace the layout number in CSS with the product layout number you are using.