Use the julian matrix - (point wrangle)
matrix M=detail(1,"xform");
@P=@P*M;
plug the transform you want to "copy" into input 2 ("1") and the object you want to transform with said transform into input 1 ("0").
MAKE SURE the transform node has the xform ticked at the bottom, so the wrangle can actually access the "xform"
This is especially relevant for when you overuse $CEX etc bounding box for pivots & you suddenly change the geo size. Eg you rotate your thing into place, and do so using the centre of a short object, but suddenly you need to substitute it with a much taller thing.
