It worked for me for flights this last weekend. The first of the 2 flights posted a little before 72 hours after the flight. Expecting Sunday's flight's DSC to post today or tomorrow.
Good luck!
I've set up an alert on my phone (in the Qantas app) previously, and it's never notified me, despite the conditions definitely being met for one. Oh well.
So from my experience, I'd say the answer is No.
I think the confusion is over seatback IFE vs "personal IFE". Only one plane has neither streaming IFE or seatback IFE. The plane juddles had (VYC) doesn't have seatback IFE but does have Q-Streaming.