PHP 7.3 reaches end of support in December 2021 and Adobe Commerce 2.3.x reaches end of support in April 2022. We strongly recommend planning your upgrade now to Adobe Commerce 2.4.x and PHP 7.4.x to help maintain PCI compliance.

Magento_AdvancedCatalog

Magento\AdvancedCatalog module introduces list of optimizations to allow higher concurrency on product management operations with immediate update of product data on frontend and plays as an extension to indexation logic of Magento\Catalog module.