This is a great feature:
The “Title bar window shake” is a lifesaver for those times when you have a million windows open and you need to really drill down and focus on just one of them. To do so, you simply click and hold on your desired window’s title bar and, while holding the mouse button down, give it a little wiggle back and forth. All the other windows you have open will be minimized.
I wonder why Microsoft decided to turn this off by default in Windows 11.
By the way, on Mac I simply use the ⌘+⌥+H keyboard shortcut.