Draggable inside one droppable element

I'm trying to create a floating toolbar using @dnd-kit/react experimental, but I can't find a way to drag and drop inside a droppable element, it always fallsback to a default position, I want to position the draggable element anywhere in the parent element. Is it possible right now ?

Start by reproducing the floating-toolbar case with @dnd-kit/react experimental, focusing on dragging within one droppable parent. Read the relevant drag-and-drop behavior and determine whether arbitrary positioning inside the parent is supported; done should be a documented usage path or a clearly scoped change request.

Written by the indexing model from the issue text.