im new to MakeMKV, so sorry for my questions...

I try to backup my 3D BluRays to MKV and save the Files on my NAS to play it through Serviio to my Samsung TV.
Problem is, that the TV shows the MKV File only in 2D.
Did i forget something or is there anything else to do?
I extract the 3D Video file and only the German language. The File is showing right in 2D, but no 3D...
Thanks for your help...
LJ