I’ve thought the same, but no head turns looks like its now standard in Australian news. SCTV Tas don’t do it, Seven RQLD don’t do it. Though Nine Adelaide did head turns in the early 2010s when they still had keyed weather.
Seven Adelaide always did it with the old wooden set but the green screen was always immediately off-side so it was still natural for a head turn. But for a while now, they’ve returned to green screen on the (commendable) rare occasion that Amelia’s actually presenting in the studio and not on-location. Head turns for Amelia very, but Jane and John don’t. Likely to do with the fact that the green screen is located in front and to the left of the set from Jane and John’s perspective.