Another track that SimTraxx has been working on for AC and then releasing for rF2 is M1 located in Detroit area. It's available for pre-order as well. Looks like fun! https://www.simtraxx.net/shop/product/rf2-m1-concourse-ultimate/
Does click on "Add to Basket" and then proceed in the usual Way, not work? If not, maybe it's because it is not active yet, because they have written: PRE-ORDER / v1.0 Release planned for 01/2021
Yep! Add it to the basket, pay for it and then you will be sent an email with a link that doesn't work yet until it's released. It's still pre-order for rF2 (released only for AC so far). When I pre-ordered Autobahn for AC and rF2, I got an email with links for the downloads. All links pointed to their Salem track, but once released, the same link works fine.