Review Schema for Custom post type

Hi,

I’m struggling to get all the needed information correct for the schema on my custom post type. I decided to do it manually, but I don’t now how to get the rating data out of the review summary.

My code snippet looks like this:

function cwpai_add_kirpputori_schema() {
    if (is_singular('kirpputori')) {
        $post_id = get_the_ID();
        $business_name = get_field('kirpputorin_nimi', $post_id);
        $description = get_field('description', $post_id);
        $url = get_field('website', $post_id);
        $address = get_field('osoite', $post_id);
        $image = get_field('image', $post_id);

        $schema = array(
            '@context' => 'https://schema.org',
            '@type' => 'LocalBusiness',
            'name' => $business_name,
            'description' => $description,
            'url' => $url,
            'image' => $image['url'], // Add the image URL
            'address' => array(
                '@type' => 'PostalAddress',
                'streetAddress' => $address,
            ),
        );

        echo '<script type="application/ld+json">'.json_encode($schema).'</script>';
    }
}
add_action('wp_head', 'cwpai_add_kirpputori_schema');

How to get the values for AggregateRating to get the review schema correct? Where is this data stored in Site Reviews plugin?

 'aggregateRating' => array(
                '@type' => 'AggregateRating',
                'ratingValue' => $ratingValue,
                'bestRating' => $bestRating,
                'worstRating' => $worstRating,
                'reviewCount' => $reviewCount,
            ),

Thank you in advance ??

Example url:
https://kirpputorit24.fi/kirpputori/bella-kirppi/

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