Contributions through pull requests are not supported for this topic. Open a GitHub issue to provide feedback.
PHP 7.3 reaches end of support in December 2021 and Adobe Commerce 2.3.x reaches end of support in April 2022. You may want to consider planning your upgrade now to Adobe Commerce 2.4.x and PHP 7.4.x to help maintain PCI compliance.

ScalableCheckout

Magento\ScalableCheckout module provides ability for system extension (Checkout can be configured to work with separate DataBase). Extraction of Checkout tables to separate database will guarantee better scalability for Magento, and will allow main server to be optimised for read operations which will reduce latency.