Variation product SKU missing leading to Google shopping product price mismatch

Hello,

Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.

The method we use for the Schema markup is according to Google guidelines for the Product Schema: https://developers.google.com/search/docs/advanced/structured-data/product

However, if you would like to modify that to show each offer and its data individually you can add and modify this filter to your particular needs:

add_filter( 'rank_math/snippet/rich_snippet_product_entity', function( $entity ) {
    if ( ! is_product() ) {
        return $entity;
    }

    $product = wc_get_product( get_the_ID() );
    if ( ! $product->is_type( 'variable' ) ) {
        return $entity;
    }

    $variations = $product->get_available_variations();
    if ( ! empty( $variations ) ) {
        $offers = [];
        foreach ( $variations as $variation ) {
            $price_valid_until = get_post_meta( $variation['variation_id'], '_sale_price_dates_to', true );
            $offers[] = [
                '@type'           => 'Offer',
                'description'     => strip_tags( $variation['variation_description'] ),
                'price'           => $variation['display_price'],
                'priceCurrency'   => get_woocommerce_currency(),
                'availability'    => $variation['is_in_stock'] ? 'https://schema.org/InStock' : 'https://schema.org/OutOfStock',
                'itemCondition'   => 'NewCondition',
                'priceValidUntil' => $price_valid_until ? date_i18n( 'Y-m-d', $price_valid_until ) : '2025-12-31',
                'url'             => $product->get_permalink(),
                'sku'             => $variation['sku'],
            ];
        }
    }

    $entity['offers'] = $offers;

    return $entity;
} );

You can change each property according to your needs and remove any properties that you don’t require for the offers.

The filter should be added to your active theme’s functions.php file. Here’s another way to apply the filter using the rankmath.php file:
https://rankmath.com/kb/filters-hooks-api-developer/#adding-filters-and-hooks-in-rank-math-php

Lastly, we also recommend that you read through this guide to learn more about the way Google tries to identify the price and the guidelines that you need to set for your prices on the website: https://support.google.com/merchants/answer/6324371

I hope that helps.

Thank you.

Hello,

I am glad that this resolves your issue.

We are constantly improving our plugin and we appreciate your feedback. We have noted your input and thank you so much for sharing it.

Please do not hesitate to let us know if you need our assistance with anything else.