Official VTK wheels have no remote modules. I don’t forsee that ever changing. It does support making your own wheels with them, but a plain pip install vtk won’t have them.
I’d rather see them just go into VTK or stay out of its repository. It’s code that isn’t under our code review process and my knee-jerk reaction to remote modules breaking our CI is to just turn them off because coordinating changes is not easy (though not breaking API is obviously better here).