To view the job variables configured for a deployment at the time of a historical flow run, you can refer to the configuration in the UI under the Configuration tab.
For more detailed steps on how to override and view job variables, refer to the documentation:
How to override job variables on a flow run:
https://docs.prefect.io/latest/guides/deployment/overriding-job-variables/
Unfortunately, there are no specific GitHub issues addressing viewing historical job variables directly.
If you need this for auditing or debugging purposes, you might consider logging these variables at the start of your flows or maintaining a separate record in a persistent store.