Very welcome!
So, I was able to import it back into Unreal with all the morph targets and bones successfully, but when I hooked up the supplied LODSettings file and applied, the LODs it created didn’t actually have any reduced triangles (1-8 were all the same as LOD 0). I had to get rid of the LODSettings file to create the properly reduced LODs (but that limited the number of LODs to 6). There’s probably some settings we can tweak inside the file.
One thing I also noticed is that I lost the face post process animbp association (which contains the control rig), so that I couldn’t run live link to animate the face anymore. I’m sure there’s a way to reassociate the post process with the imported face, I just haven’t figured it out yet (might be possible to simply override the existing metahuman face by reimporting over it, and then we probably wouldn’t have to worry about losing the post process association).