Based on the description below I tested different scenarios with no luck so far.
To define a Stakeholderelement, which is part of Motivation category, the syntax will be Motivation_Stakeholder(StakeholderElement,"Stakeholder Description").To define a Business Service element, the syntax will be Business_Service(BService, "Business Service").
@startuml!include <archimate/Archimate>Strategy_Value_Stream (SVStream, "test text")@enduml
@startuml!include <archimate/Archimate>Strategy_ValueStream (SVStream, "test text")@enduml
@startuml!include <archimate/Archimate>Strategy_ValueStream (VStream, "test text")@enduml
@startuml!include <archimate/Archimate>Value_Stream (VStream, "test text")@enduml
@startuml!include <archimate/Archimate>Value_Stream (SVStream, "test text")@enduml
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I think it is not complete. At this moment I suppose that the solution would consist on creating the sprites.
For example, a link with all official icons: Value Stream Mapping Symbols | Value Stream Mapping Icons | Value Stream Mapping Template | Vsm Symbols Excel (conceptdraw.com)