How to embed the cart list to the form

How To
1

I want the client to use the Woocommer cart function, but I don’t need the checkout and stuff.
So I made this page and put a form with the cart list.
But I don’t know how to embed the CART list in the email.

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I tried the code below to fetch the cart list, but the shortcode {{cart_items}} doesn’t work as planned.

function get_cart_items() {
    global $woocommerce;
    $cart_items = $woocommerce->cart->get_cart();
    $products_info = '';

    foreach ($cart_items as $cart_item) {
        $product = $cart_item['data'];
        $products_info .= $product->get_name() . ' - 数量: ' . $cart_item['quantity'] . "<br>";
    }

    return $products_info ? $products_info : '购物车为空';
}


add_filter('bricks/template_variable', function($variables) {
    $variables['cart_items'] = get_cart_items();
    return $variables;
});