In order for Litchi (or any other app developer such as Maven or Dronelink) to support a drone, that drone must first be supported by a software library of functions called an SDK (Software Development Kit). Depending on the circumstances, it may take DJI up to a year to provide support for a new drone in their SDK.
Normally, one would think that because the DJI Mini 2 is already supported by the SDK, and the Mini 2 SE differs from the Mini 2 only in its camera, that it should be trivial to add SDK support for the Mini 2 SE. While this may be true, it is complicated by the timing of the release of the Mini 2 SE.
The Mini 2 is supported by SDK version 4. After the Mini 2 drone was released and after support for it was added to the SDKv4, DJI introduced a totally new rewrite of the SDK and called it version 5. DJI also stated that no more development would continue on SDKv4.
That unfortunate sequence of events left the Mini 2 SE orphaned between SDKv4 and SDKv5. On one hand, it would be trivial to add support for it in SDKv4. However, DJI is now only actively developing in SDKv5.
There are only two ways support for the Mini 2 SE can be provided:
- DJI would need to resume development work in SDKv4 adding support for the Mini 2 SE
- DJI would need to add Mini 2 SE support in SDKv5
It is unclear if DJI will do either.