Drag and drop action in a 360/VR project.

No. You can only add hotspots to the project, which are interactive objects allowing you to show some static objects (text/image/audio) or question slides. The other actions you'll find in the dropdown list are navigation etc.

However you can have a project with 360 slides and a normal D&D slides. A 360 slide can be inserted in each project, but those slides don't support Question overlay slides to display by a hotspto. Use the navigation xommands in the hotspot action list to navigate to the DaD.

Have a look at:

Timeline for 360 slides (static/video) - Captivate blog

Tips and Tricks for VR projects. - Captivate blog