In the past, when DJI added support for a new drone to their SDK, Litchi was able extend their support for that new drone rather quickly. This was because the same functions in the SDK would now successfully communicate with the new drone leaving only minor changes, it any, for Litchi to make in their app.
However, with DJI’s move from SDKv4 to SDKv5 it gets more complicated. SDK version 4 (what Litchi is based upon) and SDK version 5 are incompatible. This means that one app (such as Litchi), cannot use both SDKv4 and SDKv5 at the same time. So, any new DJI drone supported by SDKv5, will require that Litchi write a totally new app, based on SDKv5 to support that drone.