Unreal Engine doesn’t have a native input for height maps, but it has the next best thing, which is a conversion from height information to normals. We can supply a texture and a strength parameter, then add both to a NormalFromHeightmap node.
This can be useful if you only have a base texture for your object and would like to imply a bit of surface detail. Colour inputs will work, but default only the red channel is used by the node.