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.

Config

The Config module is designed to implement system configuration functionality. It provides mechanisms to add, edit, store and retrieve the configuration data for each scope (there can be a default scope as well as scopes for each website and store).

Modules can add items to be configured on the system configuration page by creating system.xml files in their etc/adminhtml directories. These system.xml files get merged to populate the forms in the config page.