When you add a Form to a workflow, you can set a an Expiration Date. With that, you can configure the Reminder Body and the reminder date. However, you can not configure a custom Expiration Body text that is sent to the user. There is only the default message.
Form Configuration screen:
The Text of the email body we would like to update:
Dear <USER>
Your access to the following form been canceled because the submission deadline passed on 2024-06-13T10:00:00Z. Contact your administrator for details.
An Idea was created that looks like it was for this same issue, and it is marked Shipped, but I can’t find any place to change the text in any environment.
https://ideas.sailpoint.com/ideas/GOV-I-3525