Probably your plugin uses some of the default WooCommerce hooks that are replaced if you use the single product builder.
Ask plugin authors what function do they use to display points?
Use XStore hook in child theme functions.php, for example etheme_woocommerce_template_single_add_to_cart to show it before or after the add to cart form, for example: add_action('etheme_woocommerce_template_single_add_to_cart', 'custom_function_name', 5);
