A question about traveling between universes

[Compsito]

My understanding is that traveling between two universal space-time continuums via conventional movement is an anti-feat, as it would imply that the universes are not truly separate space-times. However, if you have a cosmology where universes are separated by a higher-dimensional space and a character can move between these universes via conventional flight by traversing this higher-dimensional space, would it still be considered an anti-feat?

 

[AlexSamDen]

It's not an anti-feat, as per our Universe page

The most typical example is the presence of a higher dimensional space serving as a separator. In other words, two separate universes coexist in a four dimensional or even higher dimensional space, occupying different position along some additional dimensional axis. Therefore, in order to travel between such universes, the movement must be through the higher dimensional space between them. To summarize, two realms are separated through a higher dimension space if

1) A larger space encompasses all the universes or space-times
2) This space is of a higher dimensional nature