get variation name of cart item

Woocomerce - get variation name of cart item

add_filter( 'woocommerce_checkout_fields', 'pulse_checkout_fields_validate_birthdate', 9999 );

function pulse_checkout_fields_validate_birthdate( $fields ) {
    $cart = WC()->cart->get_cart();
    foreach ( $cart as $cart_item ) {
        $variation = wc_get_product($cart_item['variation_id']);
        $variationFormattedName = $variation->get_formatted_name();
        $cartItemVariationIsChildrenRace = (strpos($variationFormattedName, 'Детский')>0);
        write_log($cartItemVariationIsChildrenRace);
        
    }
    return $fields;
}