Upsells which are set to Immediate Confirmation will generate Orders which can be found on the Orders page and under each Reservation under 'Additional services by Duve'
How to Set it Up?
When setting up an upsell, go to Booking options and Select 'Instant Booking'
The Guest Experience
If an upsell is set to 'Immediate Confirmation', the purchase button will show to guests with the text 'Book Now'