What I see from the PR [0] is that it's using a new BRAW version ('The new Blackmagic RAW Immersive file format...)'. So it's as open as BRAW, that is, not much. But at least (I guess/hope...) you should be able to export each "eye" separately in a different format.

Converting to the "Apple Vision Pro" format is the last step on the pipeline, after editing.

  0: https://www.blackmagicdesign.com/media/release/20241217-01