Hello,

Please, try to add this code to the functions.php file in your child theme

function woodmart_cart_count() {
	if ( ! is_object( WC() ) || ! property_exists( WC(), 'cart' ) || ! method_exists( WC()->cart, 'get_cart_contents_count' ) ) {
		return;
	}

	$count = WC()->cart->get_cart_contents_count();
	?>
		<span class="wd-cart-number<?php echo woodmart_get_old_classes( ' woodmart-cart-number' ); ?>"><?php echo esc_html( $count ); ?> <span><?php echo esc_html( _n( 'item', 'items', $count, 'woodmart' ) ); ?></span></span>
	<?php
}

Best Regards.