Whether or not there is, or could be, a Zack Snyder edit of Justice League has been a topic of debate.
Some, like Justice League storyboard artist Jay Olivia, claim that the cut very much exists, while a VFX artist on the project says that it does not.
It’s unlikely, though not impossible, that Warner Bros. will want to foot the bill for that.
Even if no cut was made, it doesn’t mean that Zack Snyder couldn’t put his version of the movie together, but it would cost money, likely due to unfinished digital effects in the scenes that were deleted, that would need to be completed before anything could see the light of day.