Thanks to @DanPatterson for posting the list of supported drones in Site Scan Flight app. The DJI Inspire 3 is not supported in the Flight app, and we don't expect DJI to offer iOS SDK support so we won't be able to add support. I still encourage you to post an Idea if this would be of interest to you.
DJI Inspire 3 images are supported for processing in Site Scan Manager. Note that this drone is primarily intended for cinematography rather than mapping and inspection.