As far as I know, the only difference between the Mini 2 and the Mini 2 SE is the camera. One would not think that this would require any substantial changes to the current SDK. Normally, DJI would be able to add support for this new model to the existing SDK without too much effort. And as a result, Litchi would also be able to support it without too much effort. However, the process is complicated by DJI’s move from SDKv4 to SDKv5.
The Mini 2 is supported in version 4 of the SDK. Newer drones such as the Mini 3 Pro and Mavic 3 E are (or will be) supported by version 5 of the SDK. It is unclear if any development will continue in SDKv4.
As a result, no one knows the prospects of the new Mini 2 SE being supported in the SDK or by any 3rd party software.