MovementTests/scenes/path/Path.cs

using Godot;

public partial class Path : Path3D
{
    public PathFollow3D PathFollow { get; private set; }
    public Marker3D Target { get; private set; }

    public override void _Ready()
    {
        PathFollow = GetNode<PathFollow3D>("PathFollow");
        Target = GetNode<Marker3D>("PathFollow/Target");
    }

    public void Setup(Transform3D globalTransform, Curve3D curve)
    {
        SetGlobalTransform(globalTransform);
        SetCurve(curve);
        PathFollow.ProgressRatio = 0;
    }
    
    public void Teardown()
    {
        QueueFree();
    }
}