By default, for performance reasons, Requirements VP elements are not displayed in the Semantic Browser.
To show them, click on the encircled toggle button:
On model elements, diagrams and tables:
Allocating Requirements,
Allocated Requirements.
Example with a System Function:
On Requirements elements:
Allocating model elements and representations
Allocated Requirements
Referencing Requirements via incoming Internal Relations,
Referenced Requirements via outgoing Internal Relations,
The Requirement's type.
Example with a Requirement: