In the first two seasons of "Bridgerton," Lady Whistledown (voiced by Julie Andrews) only published her gossip sheets during the social season and they were mainly focused on the noble class.
However, in the present timeline of "Queen Charlotte," Whistledown is not only publishing through the winter but also discussing the scandals of the royal family, which is more treasonous.
This could hint that Penelope Featherington (Nicola Coughlan), the identity of Lady Whistledown, may have become more obsessed with her endeavor and thus been going down a darker path.
In "Bridgerton" season two, Penelope stops being Lady Whistledown after she had to defame her friend Eloise Bridgerton (Claudia Jessie) to stop her from getting in trouble with the Queen.
However, when Eloise finds out the truth, the pair have a big fallout. This leads to Penelope returning to her pen and becoming Lady Whistledown again.
In season three, we will see whether her return was the right decision.