Polycurve from Featureline

Hello.

Does anyone have an idea how I can get a “real” polycurve from a featureline?
As you can see, the existing node does not output all the points/curves.

and if I extract the points and connect them again, then I lose the arcs.

In 2025 it is working with ‘Object.Geometry’ but I need a node which works in 2023.