Yeah, this is as much a Wonder Woman story as Snyder's Justice League was supposedly about Superman, even though nearly every single story came down to Batman.
At least this story has a sense of humor about itself, but the singular focus on Batman and Batman and Batman again is really what is holding Snyder back from making this a great DCU event, rather than yet another event in which the entirety of the DCU is Batman & Friends.
To be fair, Wonder Woman is getting treated better here than she did in Doomsday Clock, in which her appearance felt more like Johns suddenly realising that he forgot to give Diana anything to do while he was obsessing over Superman, in a story that still spent more time on Batman.
It might actually be a good idea for someone to force Snyder to do a Bechtel Test for any future DCU stories, but in regards to Batman. There needs to be at least one scene that isn't about Batman, talking about Batman, or waiting for Batman to do something.