Does Arizona have a regional distributor?
No. Arizona is covered by Toyota Motor Sales, USA which is owned by Toyota Corporation. The only two independent Toyota regional distributors left in the US are Southeast Toyota and Gulf States Toyota, each of them operate in 5 states. Yes, both of them add many accessories to the vehicles that they ship to their dealers. BTW, Toyota does not like that these independent distributors are still in existence and have been trying to buy them back for many years.
Toyota is now installing quite a few of these accessories on their vehicles themselves so they can maximize their per-vehicle profit, just like the independent distributors, and in so doing, taking some profit away from the independent distributors. If the accessories are on the original manufacturer (or distributor) printed monroney label, then the vehicle came to the dealer that way.
The dealers don't have any choice on taking these accessories. They just want the vehicles, as many as they can get any way they can get them. The ONLY way to get a Toyota without any of the accessories is by doing a special order. If a vehicle on a Toyota dealer's lot (or coming in) does not have any of these accessories, it was likely special ordered and not delivered to the ordering individual. Toyota is not the only company doing this.
The dealers are also free to add accessories at-will, and most do so. The dealer installed items will be on a separate "addendum" window sticker. The selling dealer can also require that you purchase some of their accessories, even when the vehicle is special ordered. You can vote with your wallet and not order the vehicle from them.