I detailed the process in support : https://community.adobe.com/t5/adobe-xd-discussions/drag-transition-on-an-component-with-hover-state-inside-a-xy-scrollable-area-not-so-easy/td-p/12596044

a clear example of what's missing is attached
(source here : https://helpx.adobe.com/fr/xd/help/create-scroll-groups.html)
It is fine to drag a map. But drag interaction of an item snapped on the map won't work…

The idea is to be able to recreate drag/drop interaction inside draggable area.
exactly like the way you move a pin on a map.
pin has a :
- initial status
- hover status
- (optional) in progress (during the move) status
- released status

while the map remains draggable, and the pin location attached to the map as a child/parent relationship when map is dragged

Today, hierarchy of interactions in XD doesn't allow user to prototype such basic and everyday interaction.

#WeNeedMapInteractions :D