The cult of Orwella consist of many small churches and not one unified. That was ended with the fall of Kyria. They have a Grand Lady, the high-priestess, but she's more of a figurehead. She bears the Black Dagger, a relic of high power, and maybe another the Burning Blood which is a candle made of clotted blood. Nevertheless the cult is scattered all over the continent - all type of creatures can be followers - but it might be stronger in the North, as in Toron their congregations are somewhat tolerated. Maybe Tharr sees a tool in her for the Chaos.
And she is the Chaos. I think she represents the force behind decay and the end of things, and that's why she rise and disappears periodically, some stuff needs ending (like Kyria) and then she returns, and when her job is done, she goes away. Maybe she lets the opposing forces to expel her, or her powers are waning when the things that needs to be ended vanishing.
In the anarchistic church still one can find order. And that the Order of the Sword Brothers copy pasted from the Livonian Brotherhood ofc which is a hierarchical chivalric order. Their HQ is/was in Gro-Ugon, among the Orcs who are the creations of Orwella but they hate her so it's not a cloudless friendship. Recently they were beaten by the Orcs and ousted from their lands. Their grandmaster is a bearer of one of the Black Flags.
As the church of her is banned and persecuted almost everywhere they don't build temples only sanctuaries, chapels and they mask them as temples to other Gods, inns, bordellos or anything else what suitable at that place.