Object facing away from camera does not reflect in mirror?

The lower right mural with the back toward the camera is tilted toward the mirror to try to get the mural to reflect, but it does not. Also did not reflect when at 90 degree angle. Is there an option I missed? Not an essential issue to overcome, just curious if there is a solution.

It is reflected. You’ve just chosen an angle that only reflects the border of the frame rather than the mural itself. Rotate it anticlockwise on the Z axis a little ways and you should start to see something.