I wanted to just bend the end of the mesh and most part of mesh is straight, but I think for this you have to seperate it into 2 meshes.
Anyways, I found a better solution. My problem was that I don’t want to change spline when adding points and I found a solution for this. Before I add a new point I save the arrivetangent of the last point and after placing the new point I reset the arrivetangent so the existing spline doesnt change and I still have a good looking way