To define the undefinable as being “an entity” or even “outside of … physics” is simply missing the point. IMHO
Regardless of faith, unknown unknowns are simply unknown. Science cannot measure these, yet acknowledges their “existence”. Even religion, which tries to qualify these, cannot agree on how to do so.
To leave a space for “the unknown” is neither theistic nor atheistic. It is neither scientific nor unscientific to ponder and “explore” these possibilities.
So yea. I’m down for asking … and have zero identity or assumptions in doing so.