FWIW I do not believe determinism can be real in any practical sense. Even if it is provably true, it’s not actually practically applicable in anyway because it is describing an inaccessible layer of physics, to us anyway. The “layer” above our determined one would necessarily have to be non-determined to have ignited the determined “sub-reality” of ours.
I guess I am not communicating well enough but you’ve summarized the real question of this definition well: is the being within, or without our universe?
If above, then there is no contradiction. If they’re within our universe proper, on “our level” then there is a contradiction that can’t exist.
The power to create and destroy universes cannot come from within this universe. Hence this debate is rendered moot, if that is the premise that they are not within our universe/physics.
And there is only a true point in this type of discussion if you’re talking about what is applicable within our known universe.