How to update normals of object on rotation or how to preserve the original normals

How can i not rotate the normals or preserve the original normals

I am rotating a bunch of cubes, orginally before rotating an entire layer, if i clicked on a cube Face in the X axis, i would get “x” as the normal
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But when i rotate, if get Y as a normal ( i know it’s completely correct )
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But is there a way to not affect the normals while performing operations or how can we preserve the original normals