Since reintroduction, QF2 has largely run on time or close to it.
It isn't operating daily (though to be fair, November has usually been one of the three 'low travel' months in and out of Oz: too early for Christmas holidays). 'The virus' is a whole new ball game with a limited number of individuals (us!) able to travel, but some others prohibited from boarding (them!)
However on Monday 22 November 2021, B789 VH-ZNH, the 0950 hours LHR - DRW - SYD took off at 1107, about 55 minutes late, arriving DRW at 1250 on Tuesday 23, 65 down. It then took off for SYD at 1441, arriving in the mainland harbour capital at 1958, 53 minutes tardy.
Today (23 Nov), VH-ZNK arrived in LHR 15 minutes early at 0635 as QF1. FR24 asserts that QF2 today is to depart LHR at 2220 hours, 810 minutes later than the normal 0950 hours. I couldn't verify this through the Heathrow Airport site (didn't seem to work properly), but the QF site indicates that QF2 should depart 180 minutes late at 1250 hours from London Heathrow.
If FR24 is correct, it may reflect the crew having appeared at LHR for the tour of duty but then being required to rest back in an hotel when the delay intensified. I'm sure jb747 will be able to inform us more re whether that's a possibility.
I've not undertaken daily monitoring of this recently reintroduced flight but today's may be its first serious delay. (The one highlighted a few posts above was far less).
From a quick look, sometimes the QF2 arrival in SYD at 1905 AEDT forms QF11 at 2225, a 200 minute turnaround. One example was VH-ZNH on 19 November.