Hi Adam,
TfL don’t usually make new fares available early, unless it’s the annual fare change in March. They may be constrained by what has been agreed with the DfT. The data will be loaded onto the live system on December 7th, but even that doesn’t necessarily mean that it will be on the fare finder. Unless something goes wrong I would expect the fares to be available by December 14th. I will be keeping a close eye because there should also be a resolution to the Walthamstow Central issue at the same time.