No, as of right now, there is no Tesla Advertised price. It's Blank. Ford can still change the price as there is no way to configure a Lightning at the moment. Rivian has a price and that's what you will pay. Tesla honors pricing when you have placed your order not when you have made your reservation.
This is from your order agreement, go look at your account:
Agreement to Purchase. You agree to pre-order the vehicle (the “Vehicle”) that you configured when you made your Pre-Order Payment and by taking delivery, completing the transaction when the Vehicle is ready for delivery from Tesla, Inc. or its affiliate (“we,” “us” or “our”), pursuant to the terms and conditions of this Agreement. Your Vehicle is priced and configured based on features and options available at the time of order and you can confirm availability with a Tesla representative. Options, features or hardware released after you place your order may not be included in or available for your Vehicle.