How to Ratings Submission deadline

Summary:

Hiding Data Submission deadline field.

Content (please ensure you mask any confidential information):

We are trying to hide/remove "Ratings Submission Deadline" field in My Clients Group → Talent Review.

We are able to see the field

But when we Edit Layout and create a copy layout:

We only find one field FacilitatorPersonId there, and we don't see "Ratings Submission Deadline" under All Fields either :

How can we find the "Ratings Submission Deadline" field to hide?

Kindly advise.

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