dual lobe specular

do anyone know how to use dual lobe spec for characters in 4.20

A bit of a late reply but I was just struggling with the same and found the answer.To access the settings for Dual Lobe Specular you need to set your material shading model to Subsurface Profile and you need to create a new subsurface profile in the content browser which you can then feed back into the new material. The created subsurface profile contains the settings to control the dual lobe specular