Congratulations on your new purchase.
I recommend you plan to spend a few hours testing absolutely everything at the dealer's lot. Maybe call and arrange to have the TT connected to shore power and city water. Don't make the final payment or sign until absolutely everything has been tested. You will probably have to be insistent. The salesmen doesn't get paid until deal is complete.
Dealer service centers are frequently backlogged by months. You will get priority when the sales department wants to complete a sale. Many a new TT has sat in the dealer's storage area waiting for service openings, then waiting for parts through the first camping season.
I wish you good luck and happy trails ahead!