It seems no one from TIA has yet ventured on this new expressway.
You may find the helpdesk number for NHAI or EPE, and ask them directly.
If nothing comes up, I'd suggest to start a bit earlier than your expected time of departure, and take this new route. It is being covered in many news that this 135km section is ready and had been recently inaugurated by honourable PM.
This would be helpful for all of us too.