Last time I checked, CrystalSky does not yet support loading 3rd party apps like DroneDeploy. This also goes for the Phantom 4 Pro+ that uses a built-in CrystalSky display. But DroneDeploy hopefully is working with DJI to add this capability to the P4P+ from what I have read elsewhere in this forum under the entry:
Dji p4p plus - new remote?
I have a P4P+ so I am looking forward to it working with DD. Currently I use the Phantom 4 Pro with a regular P4P controller and Tab S3 tablet but the CrystalSky display has better visibility when the sun is out.