Received the following via Twitter DM:
We are sorry for the inconvenience caused. The issue you reported is caused by the fact that the current DJI Fly app is not compatible with the newly launched official version of Android 11, which was released on September 9. DJI, like other third-party software providers, is working hard to release an app version that is compatible with Android 11 as soon as possible to minimize the impact on your daily use. Android 11 will be supported by the DJI Fly app v1.1.8, which has been phase released and is expected to launch on September 13.