Add Cart icon to Navigation

I’d like to add a Cart icon to my child theme, since it’s a WooCommerce site. but I don’t see anything in the settings to add one.

I tried to add the following function but it didn’t take:

/**
 * Create Shortcode for WooCommerce Cart Menu Item
 */
function woo_cart_but() {
	ob_start();
 
        $cart_count = WC()->cart->cart_contents_count; // Set variable for cart item count
        $cart_url = wc_get_cart_url();  // Set Cart URL
  
        ?>
        <li><a class="menu-item cart-contents" href="<?php echo $cart_url; ?>" title="My Basket">
	    <?php
        if ( $cart_count > 0 ) {
       ?>
            <span class="sr-only">Cart</span><span class="cart-contents-count"><?php echo $cart_count; ?></span>
        <?php
        }
        ?>
        </a></li>
        <?php
	        
    return ob_get_clean();
 
}

/**
 * Add WooCommerce Cart Menu Item Shortcode to particular menu
 */
function woo_cart_but_icon ( $items, $args ) {
       $items .=  '[woo_cart_but]'; // Adding the created Icon via the shortcode already created
       
       return $items;
}