What tools enable non-developers to create low/no-code extensions?

Comprehensive and Detailed 150 to 250 words of Explanation From SAP S/4HANA Cloud Public Edition, Management Accounting documents:

SAP S/4HANA Cloud empowers "citizen developers"—business users without deep programming knowledge—to extend the system using low-code/no-code tools. SAP Build (Option A) is the primary suite for this, offering visual tools like Build Apps and Process Automation to create new applications and workflows on the BTP66.

Within the ERP itself, SAP Fiori extensibility apps (Option C) provide key-user extensibility67. Apps such as "Custom Fields," "Custom Logic," and "UI Adaptation" allow users to add fields to screens, change UI layouts, or implement simple business logic using a browser-based interface without writing raw code68. In contrast, the SAP Cloud SDK (Option B) and SAP Business Application Studio (Option D) are "pro-code" environments intended for professional developers who need to build complex, custom applications using programming languages like Java or JavaScript.