What is canon to the DC Spotify Audioverse?

[Zeitschiene]

I know Batman Unburied and The Riddler: Secrets in the Dark are connected, because Riddler has the same voice, even though Batman has a new one. Well, I think they are. The Flash: Escape the Midnight Circus is connected to Earth-1F (Post Flashpoint DCEU). What about Harley Quinn and Joker: Sound Mind (Batman has a completely different voice and character, though he is likely younger so idk. Like Winston Duke in Unburied has a deep voice, while this Batman sounds not deep), and did I miss any?

 

[Zeitschiene]

Before anyone says something, I know its not clear if The Midnight Circus is DCEU, but it was marketed that way and I huess it fits

 

[Zeitschiene]

Apparently so, it includes:

Batman Unburied S1
Harley Quinn and Joker: Sound Mind S1
The Riddler: Secrets in the Dark S1
**Batman Unburied S2