Should empty optional field displayed in form overview before submitting?

FORM FIELDS

Required fields: name, address, etc.

Two optional fields: overtime hours and remarks.

FLOW

  • Fill in the form
  • Click Review Form
  • Form changes to review mode (no input fields, only a summary-like receipt)
  • Review and submit

QUESTION

When an optional field is empty, should it still be displayed on the review page with a placeholder symbol (-) or should it be removed from the review page altogether?

If it is removed from the review page, does it mean that a user who filled in all fields would have a longer summary than one who didn't?

Thank you in advance.

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