This issue was present since the initial release of the Bedrock version of Minecraft. Compared to the previous Console editions (I have PS4 and Xbox One editions), the brightness/gamma has become much lighter. In the console editions, turning down the settings all of the way made it impossible to navigate caves without the use of a torch. In the current version of better together that I am playing on the Xbox One X, I have the brightness turned to 0 and can still navigate caves without using a torch.

Is this something that can be addressed in a future patch?

Thanks!