does anyone know how I can orient the Y position of a primitive or point to the Y position of another primitive?

I tried to use point $TY2-$TY but I guess they need to have the same number of points.

I'm sure that it's terribly easy I just cant find the node that I'm looking for.

I suppose you want to have the same $TY on your geometry as the reference? If you know the point number you want to reference you can use a point expression e.g. point(“../ref_sop”, pointno, “P”, 2). If you really want to orient points and polygons have a look at the align and maybe orient SOP.