@colorenzo I have installed on J4012 (not the industrial type) using Nvidia SDK.There are some packets missing, but is doable.
I have used and I5 Intel NUC with Ubuntu 20.04 as host. I had to specify a download directory by mylself. I put J4012 in recovery mode and… it has worked.
It might be handy to have a wired network connection to complete the setup properly.