From their step-up forum support post "Only EVGA GeForce RTX and GTX graphics cards with a 3-Year Warranty qualify as a product that you can Step-Up from."
so if you were not in the step-up program before 6 Jan then you/me are out of luck.
https://www.flightsimulator.com/
WEEK OF MAY 11th – Alpha Build Update 1.3.X.X.
Release Candidate in build release preparation.
Build notes in final review phase. Prepped for release.
ALPHA INVITATIONS
The team has completed step 1 of the process outlined below. We have started working...