How to enable SLI option in ubuntu 22

I am trying enable SLI for ubuntu 22.4 because when I open Nvidia setting there is not SLI.So I test sudo nvidia-xconfig --sli=On but it was error I command sudo nvidia-xconfig advanced-help and it suggest --sli=SLI for enable so I command sudo nvidia-xconfig --sli=SLI but there is an error that Invalid SLI option=SLI. What is the problem? Could you help me?