I wouldn't know the since infinite space was only shown when Selesia used her Ionion Aphoria and it was only used in the real world which is not part of the story worlds but it was an ability given by the author so yeah could be and although these are considered alternate realities/universes the real world is where they originated. Perhaps
@RM97 can give a better details of this.
And also the lack of range would be a correct approach. For example, she has the range to travel to the story worlds and cross the dimensional gap that exists between them and the real world, but she specified the need to seek for an exit in the infinite space,
she does not have enough power to escape from the bird cage of meteora and the
blog shows that it is not a simple space, but that will be left for some future CRT based on cosmology.
And furthermore, after absorbing sirius and becoming a god she could even reach the abyss which is a place that transcends the world of the gods and where the imaginative force originates and she wasn't capable of that in this current state.
So yeah, lacking range is the best approach.