The website says "Deliveries for new reservations are expected to begin in late 2023.", which is wording that hasn't changed since May when they updated the configuration system. It also says "We'll share your specific vehicle's timing as your delivery date approaches.". Reservations made right now aren't going to get a personalized delivery date until possibly January when the delivery date updates are made. Regardless, this "late 2023" number is NOT a delivery date, it is only broad guidance for planning.
The intent of this statement seems to be to inform people that if they place a "reservation" they should not expect the vehicle for at least a year and that they'll get more detailed information in the future. While it's possible that Rivian may at some point start shipping configurations like the dual-motor before they have finished shipping existing quad-motor orders, due to supply chain or other constraints, the R1S shipments have so far been pretty much in the expected sequence. Rivian is still shipping Launch Editions, and I expect that in the next few months they will have mostly exhausted the LEs and will have moved on to shipping Adventure Editions - those mostly have a 1H23 or a 2H23 date.
What is your configuration and when did you place your order? Are you in one of the states that forbids Rivian from opening a service center?