What is your setting under System Configuration, Sound Settings, Volume Settings, Ambient Sounds?

I found this post because I had the opposite problem since 7.0. I used to be able to hear waterfall partitions before 7.0, but have not heard them at all since that update.

I found that only this Ambient Sounds setting was at 50 while everything else was 100. I don't recall ever adjusting this. I play on PS5, and maybe a default or the behavior of this setting was updated for DT? In any case, moving the slider up brings back the ambient waterfall partition sound. I found that it needs to be around 80 to be noticeable. 100 is too much.