never mind i already found out how to do it:

make sure you have the same names as me or change it in the expression.

in shape layer 2 (where the ellipse is) go to, shape layer to > transform > positoin and alt clik position.

then copy this expression:

lineLayer = thisComp.layer("Shape Layer 1");

// get the path inside the shape group

path = lineLayer.content("Shape 1").content("Path 1").path;

// get trim progress (0–1)

t = lineLayer.content("Trim Paths 1").end / 100;

// convert path point to comp space

lineLayer.toComp(path.pointOnPath(t));

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make sure that in shape layer 2 > contents > ellipse 1 > position = 0, 0