Hello,
In this case, add this code
function et_cart_summ() {
global $woocommerce;
?>
<a href="<?php echo wc_get_cart_url(); ?>" class="cart-summ" data-items-count="<?php echo WC()->cart->get_cart_contents_count(); ?>">
<div class="cart-bag">
<?php echo wp_kses_data( sprintf( '<span class="badge-number">(%1$u) %2$s</span>', WC()->cart->get_cart_contents_count(), _nx( '', '', WC()->cart->get_cart_contents_count(), 'top cart items count text', ETHEME_DOMAIN ) ) );?>
</div>
</a>
<?php
}
in function.php file of child theme.
Regards