It is not missing. The VRAM checks can only be performed via NVIDIA and AMD specific OpenGL functions, for which Intel iGPUs drivers do not have any equivalent... Also, this setting would only disable real-time VRAM stats, not initial VRAM detection.
Under Linux, it is possible to override the initial VRAM detection with the LL_VRAM environment variable, but there is no equivalent override for Windows and the detection is done via a DirectX call...
Note that such a NUC would likely run the viewer much better under Linux, so if you can setup a dual boot, this would be the way to go...