I am not an official of Brave but just a seasoned user. I saw that many people are complaining that brave rewards is giving a notice saying that rewards have been paid out for November ads (December payout) but in fact, that they haven’t received it.
I think that the notice is most likely a bug which is fetching that info for November payout instead so it thinks its complete. To get official support, I have tried reaching out to Brave support and Chriscat (PM for brave rewards) to look into this and will be posting an update once I get any.
Do not worry about the payout as of now, as generally, it starts only after the 7th or 8th of the consecutive month.