What is hook or filter to show only on single product

I have function:

/**
 Calculate savings for single product
 */
add_filter('woocommerce_get_price_html', 'simple_product_saving_amount_as_variation', 10, 2);
function simple_product_saving_amount_as_variation($price_html, $product) {
    if (!is_product()) {
        return $price_html;
    }
    if ($product->is_type('simple') && $product->is_on_sale()) {
        $regular_price = $product->get_regular_price();
        $sale_price = $product->get_sale_price();
        if (!$regular_price || !$sale_price) {
            return $price_html;
        }
        $saved_amount = $regular_price - $sale_price;
        $saving_html = sprintf('<p id="saving_total_price"><span class="zh-saving-text">%s %s</span></p>', __('Ušteda:'), wc_price($saved_amount));
        $price_html.= '<br>' . $saving_html;
    }
    return $price_html;
}

As we are using woocommerce_get_price_html it is also affecting related products, lastly viewed products and so on.
Is there a way, hook or something I can limit it this way only on single product page and not in any elementor widgets or anything else?

PS. I have seen someone also asked how to calculate difference, so you can use this code as function in your theme.

This is for variable product

/**
 Calculate savings for variable product
 */
add_action('woocommerce_available_variation', 'product_variation_saving_amount', 10, 3);
function product_variation_saving_amount($variation_data, $product, $variation) {
    if (!is_product()) {
        return $variation_data;
    }
    if ($variation->is_on_sale()) {
        $args = array('price' => $variation->get_regular_price());
        if ('incl' === get_option('woocommerce_tax_display_shop')) {
            $regular_price = wc_get_price_including_tax($variation, $args);
            $active_price = wc_get_price_including_tax($variation);
        } else {
            $regular_price = wc_get_price_excluding_tax($variation, $args);
            $active_price = wc_get_price_excluding_tax($variation);
        }
        $saved_amount = $regular_price - $active_price;
        $saving_html = sprintf('<p id="saving_total_price"><span class="zh-saving-text">%s %s</span></p>', __('Ušteda:'), wc_price($saved_amount));
        $variation_data['price_html'].= '<br>' . $saving_html;
    }
    return $variation_data;
}

Here is what is happening with simple product prize with discount in attachments, where it should be show and where not….
Where not is more than this, so I need filter, action or anything that will keep this code onl yon single product page.

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Hi muamer.lapandic.cn,

Thanks for reaching to us.

Unfortunately, it requires customization and out of our basic support. Thanks for understanding our limitations.

Regards,

[Author]

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