I am using DJI Fly v 1.2.1 on my iPad Mini 5. Other than the small steps that need to be taken for the camera to work in Litchi (which I have mentioned above) i did not face any other issue. But its a bummer that Litchi is not free in the App Store.
I am finally able to get my Mavic Mini above 15m using the Litchi App.
Had to do a bit of tinkering to make the camera work.
1. connect drone using the dji fly app
2. when connected open Litchi app
3. close dji fly app
I am using an iOS device.