So I now have enough money to get the standard edition of TSW3 but not the Deluxe edition. However I saw that I could pre order the standard edition but am met with this message on the Xbox Microsoft store page for TSW3 (screenshot shows proof of the message I am receiving on the Xbox store page for TSW3)
From the FAQ (https://dovetailgames.freshdesk.com/support/solutions/articles/80001033452-train-sim-world-3-faq): "Please Note: Only the Deluxe Edition will be available for pre-order on Xbox because the Standard Edition will be coming to Xbox Game Pass at launch."