After all previous Samsung models have been upgraded with the new system version, the time has come for Galaxy Tab S7 series to get one as well.
The update has number version of T976BXXU2BUI1 and weights around 1.3 GB which is not that bad.
One UI 3.1.1 introduces things like multi-task improvements, three-split view function in multi-window with adjustable height and width for each app.
The long press to switch between pop-up view and split screen view as well as the option to open split screen view by dragging the screen from the side. Newest security update is added as well.
The update started rolling in Europe, however it should be available in other regions soon as well.