Voice is one of the things aspiring writers angst over.
However, the genre reader mostly doesn’t care about your voice as long as it’s competent and reflects the point-of-view character; they want to be immersed in the story and carried forward by the plot.
That said, my outlining tools won’t drown out your voice. Rather they will make you aware of it.
These really are tools. They let you look at your story from different angles, respond viscerally and work with what you see using your storyteller instinct.
True, if your “voice” is boring and conflict free then it will become unbearable to you and you will evolve a new one. Otherwise, the tools should help you realise the full potential of your voice, whatever it is, and whatever your preferred genre.
Here, for example, is a Conflict Diagram setting out the workings of Pride and Prejudice: