As was shown in the title.
We don’t know for sure, but it’s a popular demand the developers are aware of, so I think it’s a matter of time. For the time being, you can embed an audio in a video, and add that video to your project.
ReWire support is very unlikely, as it has been discontinued by its developer, Reason Studios. However, we know that synchronization between Dorico and other software is important, and we do hope to provide capabilities in this area in future.