Points don't have a Curve Parameter.

Unless the attribute is captured while the geometry is still a curve, it will evaluate to 0.

Here, the Curve Parameter is manipulated before capture.. you could do it afterwards.

As requested, the attribute is captured on the (implicitly) evaluated points of the curve, at capture-time. Thereafter, it is linearly interpolated for other entities occupying that field, that are on the same (green) Geometry branch of the tree.

Geometry primitive Points don't have a Curve Parameter.

Unless the attribute is captured while the geometry is still a curve, it will evaluate to 0.

Here, the Curve Parameter is manipulated before capture.. you could do it afterwards.

As requested, the attribute is captured on the (implicitly) evaluated sample points of the curve, at capture-time. Thereafter, it is linearly interpolated for other entities occupying that field, that are on the same (green) Geometry branch of the tree.