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_Variable

Magento\Variable Allows to create custom variables and then use them in email templates or in WYSIWYG editor for editing description of system entities.