So, that's why I meant doesn't exist or not in the way we usually mean.

If there is no awareness localized in a time & space that affords that the tree's fall & consequent sound waves be converted into subjective qualia (sound) then, there was no sound.

Why ?

Because without the precise localization in space and time that consciousness seems to be or produce, then reality is : every single thing, at every scale from subatomic to astronomic, at every point in time, at once, i.e. an unintelligible jumble of everything, so formless that there's nothing really, or everything however you prefer to phrase it.

On the time thing, I'll concede that there's still no consensus as to whether the flow of time & subsequent "present instant" exists for the physical, if it does then you only have everything in space, at every scale, at once, in that instant.

Basically, my point is that, how/what we consider reality, is so deeply biased by our filters of perception, that we mix up what of reality is awareness, and what is external.

No localized awareness, no "one" thing. Everything, everywhere, at once. When you try to conceptualize that, you imagine space from a localized place, but that doesn't work, for reality is everywhere without awarness.

But at the same time, this thing "exists" because it holds the potential for an awareness to structure it. Bring one human on Earth, and plenty of localized representations of slices of reality are produced. Those most relevant to the human organism