I managed to activate ray tracing using NVIDIA GeForce Experience. Open the console then navigate to home and you should see World of Warcraft, optimize the settings to enable ray tracing.
P.S im running on a Rtx 2060 mobile, 16GB ram , AMD Ryzen 5 3500H.
I usually get 80-100 fps on questing, roaming etc. RTX dropped that to about 30 with only a small noticeable difference in visuals.