Hey, @DanBrill320 
Thanks for the question. I don’t think you are missing anything. There isn’t a default key to link these in the manner you are describing. You might be able to build out a solution using a custom property on one of the objects, something like related_ticket_ID or related_feedback_submission_ID, and then either link them manually or using a workflow or other automation. Or look into if you can leverage the Associations API to create a custom association between these objects.
We’ll leave this open in case other community members have a suggestion for you.
Talk soon! — Jaycee