I have a D90 X Dynamic 2021 MY on order (Scheduled to arrive march) but I just went to go play with D90 configurator...you can no longer select any model except the First Edition for the 90. No HSE, No X Dynamic, No X.

Any explanations?

 

Sounds like you accidentally navigated to the 2020 build pages instead of the 2021 section. I also have a D90 on order (April delivery) and had the same problem with the configurator.