Do you need an Adobe Sign license to use "Reusable layer of form fields"

I currently have an Adobe Acrobat Pro subscription license. This is supposed to include Adobe Sign.  I have the ability from the Adobe website to create and use Adobe Sign templates and other Adobe Sign features. But when I try to use the "Apply a reusable layer of form fields" feature, I am missing the "Field Templates" pop-up option.  I found the reference to this feature here: https://helpx.adobe.com/sign/using/form-field-template.html

Do I also need to have an Adobe Sign license to use this feature, or has this feature been removed?

Thanks for any information that can be provided.