In the Wireframe representation, you are showing line segments only - there isn’t a frontface or backface as in the Surface representation because the faces aren’t being shown.
However, there is an option Hidden Line Removal that you can enable to get the effect I think you are looking for. Here’s an example:
I thought the backface with wireframe used to work. I thought the wireframe was draw by drawing the polygons with an edge-based rasterizer so front/back was still known.
Maybe the way we do wireframe is different. Maybe the support for this in OpenGL is gone. If this does not work, we should probably at least remove wireframe as an option for the backface representation.