Exactly; Brook Lynn semi-turned it on when Lois first came back, but that did not stick very long. Even Olivia's accent isn't as pronounced as it was back when Lisa LoCicero first debuted. It's become quite... posh.
They're using 4K cameras, but I don't think they're using a post-production for that of a 4K camera product. When these cameras were introduced back in 2018 they weren't as blue or as cold. I did some brief colour changes based on the August 1 episode, and these are the results:
Even the slightest of changes just makes the scenes look more... dynamic and interesting. It's very blue (what airs) and, it shows, especially in the lighter-lit scenes. And I think Gary Tomlin has that history at other soaps that I'm not sure if others do or not, and it shows.