There’s a little note in the nvidia page that helped me fix this:
https://docs.omniverse.nvidia.com/con_connect/con_connect/ue4.html#a-note-about-the-epic-games-usdimporter-plugin
In version 102.1 of the Omniverse USD Plugins the USD library was modified with prefixed library names to allow the Epic USD plugins to run together with the Omniverse plugins. Note that some export functionality (File : Export : .usd) may be impacted due to the registration order of UExporter extensions.
So be sure to have the official Epic games usd importer plugin active
Now it’s working!