The problem is when i add some spotlight in to the scene(using PBR Unity Light Component), I can't turn off shadows

When I turn off the Shadow visibility and cast shadow,it became a point light

When I turn on the camera visibility from the light ,it show a black cylinder that influence the shadow,

so how can i turn off shadows and keep the spotlight?
Also , dose Unity Octane support IES light? and how to use the volumetric spotlight?

I had try many IES light from PBR Unity Light Component >Emission>Distribution>IES,
but it just look like the same.