Lets play who can model outside the universe.
ok so instead of trying to directly project full 5d space time with universe layers in 4d spacetime the model can be reduced. So this model is represented with 3d sheets where by you can pick a point on the universe sheet and shift that point up or down and how deep relative to a point in our space all the others points along the sheet measurements bend inwards from up to down into the point you are analysing. the more drag there is from the neighbouring sheets of both sides the more thicker that part of the sheet and their are points which there are tunnels between sheets in both or a single direction. single or bias directional drag in the sheet can be represented in the point in the sheet being offset closer to the sheet with the dominant drag.
From the eventual completion of modelling this moment in time on this scale you should be able to gather a sort of spacetime shadow imprint of the 2 neighbouring sheets.
you could find this information with my 4d space time model compared to the real world data using an extra weight attribute.
This would explain why heavy mass effected space is such an exotically diverse in all the scales of structure found in the universe. for example a big rip at the top of bundles of galaxies would be an indication of a high drag bias. where as more electrically charged space would represent where little drag is effecting the space causing that part of the universe higher 4d spacetime weight.
Using this and further techniques to decipher the extra 2 directions we could eventually find the 2 shadows from the universe sheets either side.