I also have 2020.11.103.5 - but no tow hitch (6/30 delivery), though I did call in once the tow hitches became available and asked for them to add it, but due to my locked in price, the tow hitch would have cost me close to 4k, so I ordered one for 1200 the day after delivery. I did ask them on the phone at the time to make sure that my model Y will support a tow hitch as I want to add one, and they said they would add a note. Not sure if that is why I got/am stuck with 2020.11.103.5.
I am anxiously awaiting exFat support.