It’s not even clear whether Ksenia will go to cup final, but she only had 1 performance in over a year, where she popped her quad, doesn’t have much of a international reputation yet, so quad or not, she won’t be sent over Aliona, a reigning European and GPF champion, and Liza, a WC.
If she landed a quad at RCF, it will likely be perceived as a one off good attempt, since we’ve only seen her trying it once before, and it was a pop then. There’s no guarantee she has a consistent quad, and Rusfed won’t risk it.