The 3rd Dimension alone would be the 1st Inaccessible into Tier 0. It's capable of having Infinite Dimensions (High 1-B), Timelines (1-A+), The Box (High 1-A), 001 (Authors can extend the Cosmology infinitely and still view it as fiction, Tier 0), The Absolute Supreme (Apophatic to 001, so 1st Inaccessible into Tier 0).
4th Dimension would be able to do the same, with its Infinite Dimensions all acting as layers into Tier 0, It's Timelines, It's Box being Inaccessible to those Tier 0 Dimensions and Timelines.
Then you still have the actual Cosmology outside of the Dimensions such as the Real Multiverse, the Box, the actual Land of Light, 001, The Absolute Supreme.
And all of that is still within only a single True Dimension.