Probably not. Judging from the Cemu website they are using OpenGL for their 3D rendering. vorpX should be able to display most OpenGL games in the headset, but stereo 3D is limited to rather old OpenGL versions, unlikely that Cemu is based on a version that old.
I may look into stereo for more recent OpenGL versions at some point, but there just aren’t enough OpenGL games out there to justify making this a proiority. Always way to many other things that need attention.