You might just be misinformed. New stuff:
Looking at GT Planets preview they also state
Probably the biggest new feature of all is the return of dynamic time and weather following its absence from GT Sport. These environmental effects might seem small, but they can have a major impact on racing — and enable realistic endurance races once again.
We don’t know yet if the weather and time variations will apply to every circuit in the game, but the official GT7 landing page on the PlayStation 5 microsite suggests that all “90+” of the game’s launch track variations will indeed offer this functionality.
So I guess it's Eurogamer that's misinformed or trying to stir up shit with
Given the reluctance to explicitly mention dynamic weather or time transitions in the blog post I'm guessing they won't feature in Gran Turismo 7