Taking into reference similar wording, similar stuff alongside the cardinal directions is sometimes generalized as meaning "all of space" even when including places where there are higher dimensions.
The most clear example is Pokémon whose entire foundation of the 4th gen is exactly in the meaning of the word "Uchu" and "Sekai" using space as "up down, left right and back forth", and even in that case space is proven to have at least one more direction as parallel spaces are a thing that are encompassed by it.
Another similar example is the Four Holy Beasts in Digimon whose entire function is to set up the structure of all of time and space using the 4 cardinal directions as the basis for everything, but even in that context there are higher dimensions beyond just those, and yet when it's talking about space in an abstract sense, they often just call "up and down", "north, east, west, south".
In some cases, "north, east, west, south" are just a generalized way of saying "the general concept of directions", the same with "up, down, left, right, back and forth".
I'm almost perfectly sure that Nasuverse has clear examples of higher dimensions, so it mentioning the traditional spatial directions as "all dimensions" can be thought as just a general way of doing so.
Another similar example is that of 8, 80, 800, 8000, in Japanese like
the 8 million gods, all have the traditional meaning of in fact referring to the
"greatest number" "infinite", and "beyond count". So depending on the context, what seems to be limiting in fact just a way of generically calling an entire concept, instead of that specific version of the concept. It'll all depend on context in the series of course.