Can confirm that it does, at least on the pixel 9 pro fold, after enabling it in developer options.

However, I don't see the top window handle they show in the animation. I have to long press the app icon in the running apps view, then I get a free form option. At that point, I get the floating windows with controls. You can tap and drag the sides and corners of apps to resize windows, seems intuitive enough.

Its phone hack