Is there information available about estimated / calculated "terminal velocity" (free fall with air resistance) for DJI drones? I am specifically interested in Mavic 2 Pro / Zoom, Air 2S and Phantom 4 v2.

Hi,
You might be better off posting your question in the 'Products' section of this forum.
That is way more active.
Just go to https://forum.dji.com/forum-129-1.html and create a new thread in the right topic / subtopic.