Official comment
I wouldn't plan on the Autel Nano being supported any time soon. Their SDK isn't super reliable.
For anything to be supported DJI has to release iOS SDK support for it first so we can talk to it. They have not done so with the Mini 2 yet. So I would imagine the Mini 3 will be a while. We plan on supporting the Mini 2 when we are capable of doing so.
The Mini 2 is supported by the DJI Specific workflow in Maps Made Easy even though it is missing some tag info. In any case the Classic workflow would work with any image has the most basic GPS tags. The Mini 2 camera is actually pretty decent. Optical quality is more important that megapixels.
You can use the Mavic Pro and Map Pilot Pro to estimate numbers of images since the cameras are pretty similar.
You can elect to generate KMZ files when processing your images with Maps Made Easy.