Electro - Single Product Gallery Navigation

functions.php

function el_child_wc_gallery_options( $options ) {
    $options['directionNav'] = true;
    return $options;
}
add_filter( 'woocommerce_single_product_carousel_options', 'el_child_wc_gallery_options', 99 );

style.css

.single-product .product-images-wrapper .flex-direction-nav>li a {
    font-size: 0;
    padding: 8px 15px;
}

.single-product .product-images-wrapper .flex-direction-nav>li a:before {
    font: normal normal normal 14px/1 FontAwesome;
}

.single-product .product-images-wrapper .flex-direction-nav>li .flex-next:before {
    content: "\f054";
}

.single-product .product-images-wrapper .flex-direction-nav>li .flex-prev:before {
    content: "\f053";
}