Magento 2.3 – Layer navigation with custom product collection not working

I have created a preference to add my custom filter to the collection.

di.xml

This is my ListProductPot.php file

    < ?php
namespace VendorModuleBlockRewriteProduct;

use MagentoCatalogApiCategoryRepositoryInterface;
use MagentoCatalogBlockProductContext;
use MagentoCatalogModelLayerResolver;
use MagentoFrameworkDataHelperPostHelper;
use MagentoFrameworkUrlHelperData;

class ListProductPot extends MagentoCatalogBlockProductListProduct
{
    public $featuredProduct;

    public function __construct(
        Context $context,
        PostHelper $postDataHelper,
        MagentoFrameworkStdlibDateTimeDateTime $dateTime,
        VendorPotHelperData $potHelper,
        VendorPotBlockFeaturedProducts $featuredProductList,
        Resolver $layerResolver,
        CategoryRepositoryInterface $categoryRepository,
        Data $urlHelper,
        array $data = []
    ) {
        $this->featuredProduct = $featuredProductList;
        $this->data = $potHelper;
        $this->datetime = $dateTime;
        parent::__construct($context, $postDataHelper, $layerResolver, $categoryRepository, $urlHelper, $data);
    }


    public function getLoadedProductCollection()
    {

        $collectionArray[]='';
        $objDate = $this->datetime;

        $helperPot= $this->data;
        $currentDate = $helperPot->getCurrentstoreDate();
        $products = parent::_getProductCollection();
        $collection = $products->addAttributeToFilter('sku', ['in' => array_filter($collectionArray)]);
        return $collection;
    }
}

But it is not working on listing page.

I am getting product collection every time same.

Any help will be appreciated .