If the universe is not fully deterministic, emergent properties might not be causally tied to fundamentally reducible and observable lower-level phenomena.

Reductionism just might not work in many cases, nor the possibility of its opposite.

I’m not a physicist nor do I have any aspirations in this field, just stating something more as an arena of thought and as chain of logic rather than saying “dark matter is fake” or whatever.

If emergence is at some levels causally disconnected or even disordered (time variance discrepancies, etc), then some mysteries will remain ever so (which I find likely).