Display creation date of performance document on the performance document

Summary:

I need to display the creation date of a performance document on the document. I am using the HRA_EVALUATIONS flexfield. The problem is that, at least from my understanding, the flexfield cannot use parameters for the value set, so I am not sure how to get the specific document's creation date. If I could pass in a parameter, like assignment_id, I would be able to link the creation_date from HRA_EVALUATIONS table to the document. Does anyone have any advice on how to do this?