When importing custom LODs built in Maya, UEFN disregards them and creates new ones based on the LOD0 mesh automatically. Seems to ignore import settings.
As a test we created a simple FBX with different shapes for the different LOD levels.
![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/b/7/5b7b9f3c4b5106c0d0ca66b5596d08cfa14c14d5.png)
After import, UEFN generates new LODs from the LOD0 mesh only.
Import settings.