Thanks @kantemrati
I have gotten the body conform feature to work nicely with your meshes albeit using ZWrap inside ZBrush. This suffices for me but I really hoped there’d be a way to do this by just sculpting on the exported Body Mesh out of the Metahuman Creator 5.6 Export Section. I will keep at it for now trying ZWrap.
Hopefully the feature set in the future will allow to to just import any body shape like you were able to do with the previous Metahuman Identity from Headmesh option.