Check if product is has a varation or not

Never mind I got the hand of it
Here is the sample Code

add_action('woocommerce_after_shop_loop_item', 'show_more_color');
function show_more_color() {
    global $post, $product;
    if ($product->product_type == 'variable') :
        // Get product variations

        $variations = $product->get_available_variations();
        $testVariable = $variations[0];
        $check = $testVariable['attributes']['attribute_color'];
        if ($check) {
            echo '<a href=" ' . get_permalink($post->ID) . '">More Color</a>';
        }

    endif;
}

Hello,
$product->product_type returns null for me when I do:
$product = new WC_Product( $product_id );
Im expecting simple or variable, but it returns null.
Any ideas?