Thanks. But I would actually not say that QM "allows retrocausality." Instead I would say that the whole concept of "causality" simply meaningless in a time-symmetric system, just as the concept of (say) "up" is meaningless in a spatially symmetric system.
It’s so funny that quantum physicists chose the term “retrocausality” because the literal meaning of its parts (“ex post facto”) can only be understood in the context of the “arrow of time”.
Perhaps wordsmithing that alludes to a superordinate context (beyond time) would be more appropriate..