Hi @MAReeder ,
The timer job Workflow Auto Cleanup runs daily to permanently deletes workflow instances and related tasks that still exist 60 days (default value) after a workflow is completed or canceled. Workflow history items themselves are not deleted, but the entry point to view them on the status page for a particular instance of a workflow will no longer be available. That is, the workflow status link on SharePoint will be removed by the timer job.
This article is for your reference: Share Point online workflow History
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.