Unable to find the components/Constants regions in VBCS to disable a field

Summary:

Hi,

We want to disable the "Highest Education Level" field under Personal Information —> Demographic Region using the VBCS.

I have clicked on "Edit this page in VBCS" option for the respective Redwood page as shown in the document but I could find the Components /Constants to search and apply the disable property for the field

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