We may look into this in the future, and having it listing here as a future idea helps remind us.
We are currently working on other parts of the app at the moment. That is why I suggested looking for some other kind of app for now. I can see the advantage of not having to export audio files and PDFs of each song, and having this built in to iReal Pro.

However feel free to share your solutions here if you would like. There may be others wanting to do the same or similar.