Service Catalog does not display user defined fields created in standard request templates. Why?

Service Catalog does not display user defined fields created in standard request templates. Why?

Hi, I am trying to use the Service Catalog but we have added user defined fields under the HelpDesk Customizer.     We use these in request templates we created before the Service Catalog was added to MSP.   

Why don't I see those same user defined fields when making a new Service Catalog Template?    I have Service Desk + MSP 8200

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