If you're listing for a specific person you could put it in any category that allows you to opt out of Simple Delivery and so when you buy your own postage you will be able to add the tracking to ebay like we used to.

So change category or sub-category until you get "Oversized" at the bottom of the weight pop-up under the Package size heading, during the listing process.   Then click on Add Primary Service to buy your own postage.   It has to be done on a laptop or desktop rather than the app.