How long are requisition, purchase order and agreement approvals visible in the UI?

Summary:

Requisition, purchase order and agreement approval history purge timing

Content (please ensure you mask any confidential information):

How long is the approval history for requisition, purchase orders and agreements visible in the UI before it's purged. We've recently seen a change from 30 days and now seeing some from over a year ago in the requisition UI.

Version (include the version you are using, if applicable):

Redwood 25A

Code Snippet (add any code snippets that support your topic, if applicable):