Hide fields on Create Noncatalog Request page in Responsive Self Service Procurement

Our purchasing team has fields they want to be hidden in the new Responsive Self Service Procurement pages. We have the access to Visual Builder and seem to be accessing the pages without issue. In the screenshot below, I was able to expose the Negotiated button, but I can't seem to find any way to hide fields like the Manufacturer or the Manufacturer Part Number. Can anyone confirm if these fields cannot be hidden, or have steps/instructions on how to accomplish this? The documentation feels extremely scattered and I'm not finding anything to clearly identify what we can customize or hide.