Submitting this idea on behalf of a customer (Pete Cannon @ Nvidia).
The request is to have the option to have either unique or broadcast axis setting in Graph Builder. When you do a Group XY or Wrap, all the axis are tied together by design. And if you want unique axis settings, you can do a Page split. The request is for Group XY and Wrap plots to support unique axis settings, for example adding a reference line in a Wrap split plot, but that reference line would have different values for different plots. This could be handled by having the option in axis settings to broadcast that setting to all the other plots or have it unique to that one specific plot.