Looking at how to use N/file, when loading the xml template, file.load seems to load the template from the File Cabinet. I cant seem to find any of the Advanced PDFs in the File Cabinet. Where are these templates located? Im using this example as a reference:

/**
 * @NApiVersion 2.x
 */

// This sample shows how to render an invoice into a PDF file using an XML template in the file cabinet.
// Note that this example requires the Advanced PDF/HTML Templates feature.
require(['N/render', 'N/file', 'N/record'],
    function(render, file, record) {
        function renderRecordToPdfWithTemplate() {
            var xmlTemplateFile = file.load('Templates/PDF Templates/invoicePDFTemplate.xml');
            var renderer = render.create();
            renderer.templateContent = xmlTemplateFile.getContents();
            renderer.addRecord('grecord', record.load({
                type: record.Type.INVOICE,
                id: 37
            }));
            var invoicePdf = renderer.renderAsPdf();
        }
        renderRecordToPdfWithTemplate();
    });

I have Advanced PDF enabled.

That example (

templateContent = xmlFile.getContents()

) allows you to load an xml template from the file cabinet. To instead load an Advanced PDF template, use either .setTemplateById(options) or .setTemplateByScriptId(options)

Templates/PDF Templates/invoicePDFTemplate.xml

this is the actual path you need to find the xml in the file cabnet

@Sciuridae54696d that folder is empty for me. Im on Admin as well

if this is production, the other place I'd first search is if your script is included in a bundle, therefore installed in a suitebundled folder

@David B ill look into those methods

aka could be under

Suitebundle XXXXXX/Templates/PDF Templates/invoicePDFTemplate.xml

i have some customized pdfs i created from a bundle template that are no longer part of the bundle. Cant find those so far. Will keep looking

yeah, if they were originally in the file cabinet, the methods I mentioned aren't going to be of use to you, sorry