RSS won't be doing a 2020 car because it would be very, very similar to the 2019 car (info from their Discord). As posted above they focused on bringing us a properly made high quality 2021 car which will be released this February!
Yes was just released the FHX21 car,
And currently no there will not be a 20 car,
Nothing changed within the rules accept the mirrors 60mm more inboard.