As updates has rolled out, we were given a Earmuff Mode, which allows users to control how many conversations they hear in their selected preferences. I believe we need this but also the other way around, to where the user can control how many people can hear THEIR conversation, as voice falloff is already a thing in most worlds, but barley maintained or edited. Earmuff Mode and Whisper Mode goes hand to hand and I believe it would benefit a lot of people. Especially for those side needed conversations.
There is multiple ways this can be implemented. It can follow the same rules/settings as earmuff mode, but instead its control over the distance of our voice to what the world also allows (dont wanna hear someone across the whole world). Long Press Mute button can also activate it, etc.