Please add the following code to functions.php of Child Theme

add_action('rank_math/vars/register_extra_replacements', function () {
    
    rank_math_register_var_replacement(
      'listingCat',
      [
        'name'        => esc_html__('Listing Category', 'rank-math'),
        'description' => esc_html__('Category of the current listing', 'rank-math'),
        'variable'    => 'listingCat',
        'example'     => wilcityRMPrimaryCategoryToListingCallback(),
      ],
      'wilcityRMPrimaryCategoryToListingCallback'
    );
    
    rank_math_register_var_replacement(
      'listingLocation',
      [
        'name'        => esc_html__('Listing Location', 'rank-math'),
        'description' => esc_html__('Location of the current listing', 'rank-math'),
        'variable'    => 'listingLocation',
        'example'     => wilcityRMPrimaryLocationToListingCallback(),
      ],
      'wilcityRMPrimaryLocationToListingCallback'
    );
    
    rank_math_register_var_replacement(
      'listingTag',
      [
        'name'        => esc_html__('Listing Tag', 'rank-math'),
        'description' => esc_html__('Tag of the current listing', 'rank-math'),
        'variable'    => 'listingTag',
        'example'     => wilcityRMPrimaryTagToListingCallback(),
      ],
      'wilcityRMPrimaryTagToListingCallback'
    );
    
});


function wilcityRMPrimaryCategoryToListingCallback()
{
    $aDirectoryTypes = \WilokeListingTools\Framework\Helpers\GetSettings::getAllDirectoryTypes(true);
    if (!is_singular($aDirectoryTypes)) {
        return '';
    }
    global $post;
    $category = wilcityChildGetPrimaryTerm($post->ID, 'listing_cat');
    if (!empty($category)) {
        return $category->name;
    }
    
    return '';
}

function wilcityRMPrimaryLocationToListingCallback()
{
    $aDirectoryTypes = \WilokeListingTools\Framework\Helpers\GetSettings::getAllDirectoryTypes(true);
    if (!is_singular($aDirectoryTypes)) {
        return '';
    }
    global $post;
    $location = wilcityChildGetPrimaryTerm($post->ID, 'listing_location');
    
    if (!empty($location)) {
        return $location->name;
    }
    
    return '';
    
}

function wilcityRMPrimaryTagToListingCallback()
{
    $aDirectoryTypes = \WilokeListingTools\Framework\Helpers\GetSettings::getAllDirectoryTypes(true);
    
    if (!is_singular($aDirectoryTypes)) {
        return '';
    }
    global $post;
    $tags = get_the_terms($post->ID, 'listing_tag');
    if (!empty($tags) && !is_wp_error($tags)) {
        $str   = '';
        $count = count($tags) - 1;
        foreach ($tags as $index => $tag) {
            if ($index == $count) {
                $str .= $tag->name;
            } else {
                $str .= $tag->name.', ';
            }
        }
        
        return $str;
    }
    
    return '';
}

function wilcityChildGetPrimaryTerm($post_id, $term)
{
    $result = [];
    if (class_exists('WPSEO_Primary_Term')) {
        $wpseo_primary_term = new WPSEO_Primary_Term($term, $post_id);
        $primary_term       = get_term($wpseo_primary_term->get_primary_term());
        if (!is_wp_error($primary_term)) {
            $result = $primary_term;
        }
    }
    if (!isset($result) || empty($result)) {
        $terms = get_the_terms($post_id, $term);
        if (!empty($terms) && !is_wp_error($terms)) {
            $result = $terms[0];  //get the first category
        }
    }
    
    return $result;
}