Going by the video about anti flicker, it doesnt even appear like Gsync is being used or any vsync for that matter.I'm not sure entirely @mrk will know more.
I will say that since owning the monitor since August 2024 I've only really experienced proper VRR flicker in one game so far. (Silent Hill 2)
I would have thought that even then the gysnc on the monitor should have helped but it seems like it didn’t.
It reminded me of the early days of gaming in the 90s when vsync was only just a thing but framerates were not stable enough to use it (sub 30fps gaming, back when 30 was a dream)