I was wondering myself about the availability of the typical "Monster" floor and cargo mats, but have been assured by members here that they will likely be available at dealerships when we go to pick up our ID.4's.
What other potential dealer-installed options were you curious about?
My hunch is that the Rearview Mirror w/ HomeLink is the same mirror that is optioned across all VW models where the order guide shows %RV (Tiguan, Atlas, GTI). I expect these will be readily available at delivery and easily installed by the dealership.
As the name suggests, upon dealership delivery you can request MDO items be added, along with all the other upsell things typically offered when you meet with the finance guy, like "teflon" seat treatment, ceramic paint coating, tire/wheel damage warranty, etc.