Add button to WC

<?php
/*
 * Child theme functions file
 *
 */
function zakra_child_enqueue_styles() {

	$parent_style = 'zakra-style'; //parent theme style handle 'zakra-style'

	//Enqueue parent and chid theme style.css
	wp_enqueue_style( $parent_style, get_template_directory_uri() . '/style.css' );
	wp_enqueue_style( 'zakra_child_style',
	    get_stylesheet_directory_uri() . '/style.css',
	    array( $parent_style ),
	    wp_get_theme()->get('Version')
	);

	wp_enqueue_script('zakra-child-script', get_stylesheet_directory_uri() . '/script.js', array( 'jquery' ), null, true);
}
add_action( 'wp_enqueue_scripts', 'zakra_child_enqueue_styles' );

function zakra_child_product_btn() {
	global $product;
	$link = $product->get_permalink();
	echo '<a href="' . $link . '">'. __( 'Read more', 'zakra-child' ) .'</a>';
}
add_action('woocommerce_after_shop_loop_item','zakra_child_product_btn');