Being outside of nonduality would give immunity to the duality (or dualities) in question but the character would still be part of a greater system of dualities on a higher dimensional plane of existence than his.
And being beyond (as to say, qualitatively superior or transcendent) the said dualities mean that they are beyond every system and thus exist beyond the whole concept of dualities; referring to transduality
This is absurd, because even Transduality would be nuked by a higher dimensional concept or duality system.
Also I'm not sure why a simple "non-duality" has the same principles as Transduality.
It would be just as a space that existed before time or had no time would not be affected by time. In short, it seems a little silly to me. Since this field is inherently timeless and pre-timely, it will not be affected by temporal events, but will be affected by time now, after time has been created or "injected" into it later on.
To explain more clearly, for example, since a character lacks the concepts of death and life(a non-duality), it becomes independent of the effects of this duality system. However, if the concept of "death" or "life" is later added to the nature of that character or transferred/injected with another power, it will no longer be independent of the effects of this dual system.
just as a space existing before time and devoid of time is not first affected by time, but is then affected by time when a time is created in it. But when it comes to Transduality, the character's transcending the concept of duality and being "non-duality" makes it immune and superior to all the effects of duality, and it is also unaffected by the factors I have explained above.
Also here, I don't think non-duality would work like a BDE or NEP. Because these two hax are completely devoid of their nature and have never existed. You can't transfer concepts to a non-existent character, but when it comes to "non-duality", that's not how things go.
I have written so much, but I do not know how much it will be taken into account.
And I guess it's not my place to say it, but the fact that DT doesn't have an answer while there is such an important revision across the wiki puts us in a deadlock.