It was renamed to FictionJunction sometime after PARADE.
I imagine they are not really advertising it cause it's essentially an Early Best tokuten (release came with a code)? Was there any public ticket sales for the event?- https://twitter.com/FlyingDogInc/status/1737309074138808663
Not sure if this is still gonna continue as Kajiura staff/main twitter not reminding it from time to time.
30th Anniversary Early BEST Collection for Soundtrack premium screening and talk show will be held 1/21/24. Location and time is included in the tweet.