First off, the axes of the past and future were stated to be different which does not necessarily mean that these are two separate axes. And that third image of yours is not translated.
The "infinite number of futures that branch out" is merely the timelines diverging into separate timelines. And even if your point that the past and future were axes like you said, simply stating that it is "endless and scattered" isn't enough to give an infinite dimensional structure; at best the entire future itself is an axis.
This denotes timelines, not axes.
It was stated Shura has been "trusted out of the time axis", which can be more logically interpreted as being involuntarily expunged from the conventional time-flow; the statement on "moving through an infinite number of multiverses" more likely explains that a "time axes" is rather a set a timelines aka a multiverse.
And how can it not be timelines as how you presented it?
Our explanation page also has this passage, which contradicts your statement. A timeline can represent the same universe of infinite other timelines; an example can be Future Trunk's timeline also has a Universe 7 same as the main timeline.
This is untranslated. Also, "多次元" means multidimensional, yes, but not "infinite multidimensional".
It directly mentioned the concept of extra-dimensionality but not the "multitude of it". Guess that can be a shred of base evidence for Low 1-C, but this is not High 1-B at all.
Nonetheless, this is a hard net-disagree for me.