I am currently following the issue same as here.
https://discussions.reallusion.com/t/issue-with-scale-when-using-crowd-sim-in-omniverse/12758

However, I have also encountered with scale mismatches between iClone and Omniverse. The world scale appears to be 100:1. I wonder if there is any setting I am missing out. My root layer in the composer is also set like the first image attached.

Thanks. Appreciate for any help.