The Groove wallet with its leather accessory (I think it's called the Groove wallet GO) holds the key card perfectly. You can also use the GO without the actual groove wallet by sticking it on your phone.
If you switch the "ACC customize" option to off in the settings/vehicle customize screen you'll have AUX power in accessory mode (one start button push with foot off of brake).
After about 3 months with the switchbacks I realized the amber turn lights weren't working when I saw reds and blues behind me. The white worked just fine but when turn signal was on all the lights flashed yellow except for the front signals. They just stayed white. Lasfit is sending me another set.
Not really a "mod" per se.... More of a uhh.. standard feature on newer Toyotas (Except for non-limited 4Runners).
Your sales guy either sounds like he was just humoring you and your discovery, or is brand new and has absolutely zero product knowledge of what he is selling.
Ordered the topo inserts from Tufskinz but after 14 days and no shipment I cancelled the order and found these on eBay for half the price. Great quality. Planning on getting the topo badges from yotaexpedition once they release them for the '24.