According to the 11.2 Update Support Page, 11.2 was made public on 12/2. (The Beta has been around for a bit, as I had read it would provide Cash.)

Here's more on 11.2 at MacRumors

This weekend update is atypical and probably represents how quickly Apple wanted to get this update behind them on a non-news day.

MacStudio M1max - 14.4.1, 64 GB Ram, 4TB SSD; Studio Display; iPhone 13mini; Watch 9; iPadPro (M2) 11" WiFi