Hi,
Short answer is - it is not.
Yet it is possible to mount it on H520e. This requires e.g. 3d printed mounting kits for:
1) RedEdge camera
2) sunlight sensor
3) power bank
See attached picture showing the setup which I have used for a few years with Parrot Sequoia.
As for the mission planning - the simplest is to plan a standard mission for e90 in ST16e and than set RedEdge parameters using its WiFi interface on a tablet using speed and alt. set in ST16E and overlap recommended for RedEdge.