How to get 06 Displacement to show up in Surface Blend Master Material

I am trying to use Heightfields on a static mesh with a Megascans Surface Blend Material, however the Master Material doesn’t have Section 06 Displacement, it shows 04 Top Layer, 04.5 Scatter Layer then skips to 09 Misc?

I can see a folder next to the Master Material called LayerFunctions that contains a Material Function called MF_Displacement, but have no idea how to get it to show up in the Master Material, I’d be extremely grateful if anyone can help!!!