User blog comment:MakeShift/The Crisis and its impact on the Arrowverse Wiki/@comment-39856853-20200123052538/@comment-2054358-20200123062901

I think shows like Birds of Prey need more than their Earth shown in Crisis. Black Lightning was good to merge because Crisis directly affected his show with an episode leading to Crisis and an episode after. And his Freeland ended up in Earth-Prime with Supergirl and the Earth-1 heroes. We don't even know if Crisis was canon to Birds of Prey because it seemed to be non-canon to other shows like Smallville, and Birds of Prey ended 17 years ago so we can't know if Crisis really affected that show. Constantine and 90's Flash had recurring appearances in the Arrowverse. Birds of Prey had a scene in a crossover special that covered more than the Arrowverse and we'll probably not see them again.