How to add subsections to sortable list in react-dnd?

Question

typescript

Guys, has anyone done something similar on react-dnd ?
I am making a sortable list, the example is almost like in the dock, but everything is complicated by the fact that there are subsections above some elements of the list.
I don't know how to correctly model the case of having a subsection. If there was react-beautiful-dnd, then there would be no problem.