12secFord
There is no AWD fuse pull disable option on the 2020. That ceased quite a few years ago.
Even if it were still the case, it would not prevent damage to the transaxle for towing with any wheels on the ground.
This is true for most AWD cars.
As others stated... the dealer is full of something other than knowledge when he tells you your car has a full size spare.
I would be wary of anything purported to be a fact by that person.
In the US, the Subaru geniuses decided to make the spare tire well too small to fit a "normal" tire, so it's a dougnut temporary good for 50 miles under 55mph (rated).
In some other countries that aren't the USA , the spare tire well might fit a full size tire, not that that helps you out..
The above technique @Ranman676 posted is the same as you would do for a RWD car with an automatic towed from the front.
While you could do the dolly routine for a planned trip, in the case of an accident or the car dies on the road, towing with a dolly is unlikely to be an option.
With a standard wrecker, try to convince the guy on the side of the freeway that you need to disconnect your driveshaft while he waits.
Require that it towed on a flatbed is the best bet to prevent damage.