Looking at various forums today it seems confirmed that QR *is* rerouting passengers once their flights are officially cancelled.
There are two avenues here. If cancelled within 10 days of departure, you can call and get a re-route on their Tier 1 partners (including some oneworld partners). Once you get within the 48 hour window, they are re-routing regardless of tier 1 (so any available).
This applies to the entire QR network, not just flights leaving the EU.
There is of course then a third option, with is departures ex EU, which probably comes with stronger protections than the ‘within-48-hours’ policy above.
Also reports emerging that some airlines are no longer participating in the QR re-routes, and are restricting sales of seats to direct bookings only. I’m guessing there is some sort of special IATA pricing for re-reroutes which airlines are now trying to circumvent?
So it seems even if you have a flight ex AU, once it’s officially cancelled, get on to QR for your re-route. A post on Reddit confirmed a QR booking for ADL-DOH-FCO was re-routed ADL-SYD-PEK-FCO on Air China.
That’s still not going to apply to VA flights to DOH