You can actually float/ pin a widget to make it behave like a dock.
As for the actual dock, that can be achieved too by creating a folder, changing it to grid mode, and resizing it to the size you want. You can then float/pin it too.
Google Now slide left won't be planned soon as it requires Google not to change and break things in future, which is something I can't control. As a work-around, you can assign the Google app to the gesture when you swipe right
It's a bit more complicated as it involves managing screens of different resolution and sizes. Currently I'm focusing on core features that everyone will be able to use, such as dock folder and more gestures. Coming back to foldables improvements after that