Question
Is there a way to give the sDuplicate of the Fusion Shape also a jitter effect?
Answer
Shape's sDuplicate has no jitter functionality.
As for the jitter in the Shape's sDuplicate, it is possible to effect it by placing the sjitter between the sDuplicate and the sRender.
(Probably, the lack of jitter in Shape's sDuplicate inspector seems to be the intention of the product to simplify (single-function) each node and make it easier to understand visually.)