What Shader for opacity and subsurface scattering? Help please.

Hi guys, hope you are having a great day. 

I have textured an old mobile phone model, it has a screen made of a glass material with the opacity channel set. This works using the PBR metal/rough with alpha blending shader. But now im trying to add subsurface scattering to the rubber buttons (on a different texture set) and this shader doesn't allow me to add an SSS channel. I changed the shader to PBR Metal / rough and can now select a SSS channel. I made a SSS material and it is working well. However my glass material for the screen has lost its opacity after changing shader. When i revert back to PBR metal / rough with alpha blending, the SSS doesn't show. Is it possible to have both opacity and SSS channels. Is there another Shader that I should be using for this or another setting that I have missed.

Any help would be greatly appreciated, thank you.