Exporting light maps outside of Engine

I have a simple scene, which I am testing out how to export baked light maps.

I am able to preview the baked light map in unreal, via the world settings, lightmass settings, lightmaps.

I am after the diffuse and lighting information (top left of map is what I am interested in)

However, I can’t see a way of exporting this out. I have seen old posts (2013) saying this is not possible, just wondering if that is still the case?

Finding that light map in the content browser it points to this.

image