NSX 3.2.3 has the same issue, it’s based on Ubuntu 20.04 LTS. Playing in a lab I am able to add the Ubuntu repo and install USBUtils along with Dell iSM. I’m sure that isn’t supported, wish I could find something from HP, Dell or anyone on installing their 3rd party solutions on NSX Edge nodes, everything does look to work fine but no idea what would happen during an update. I imagine the base OS packages could get updated and fail if dependencies aren’t available.