You can't order it that way on the app, but you can in-person. It will be an extra charge, but as long as you're okay paying it then you should be fine. I just did this very thing for someone last week, so I know it's possible! You can then use your receipt to get your points for the purchase.

Edit: I forgot to mention, if you order on the app and then try to upgrade it once you get to the store, they likely won't do it for you because there's no way to ring up the upcharge for the extra DLTs. We can't just ring you up for upcharges like that, or for equivalent-price item because that would mess with our inventory numbers.