Can you share with me this file fits for the Xavier NX, I only found it for the Xavier and TX2.
That will be released in future. You can check the docs of Xavier/TX2 for valuable help if necessary.
Do we have any estimation on when it will be released?
What are the main differences i should look at while looking on the TX2 file?
No ETA yet, but you can refer to the doc of TX2/Xavier as there should be no big difference.