Why don't you use the DJI GO4 app that was made for it. You can download it directly from DJI and it works great. Litchi works great as well and is relatively cheap. Litchi is great if you want to do automated missions, but otherwise no real...
You need the DJI GO4 app downloaded directly from the DJI website. They stopped putting their apps on playstore at least a year ago. Just download from DJI and you'll be all set, provided your phone is compatible. It's good idea when you upgrade...
All tariffs aside, U.S. Customs is still continuing to put customs holds on all DJI drone shipments into the U.S.. The price becomes irrelevant if DJI drones cannot be delivered to the U.S. from China. This has been going on for over 6 months...
Do you have both the aircraft firmware and the GO4 app updated to the latest version. You need to download and install the GO4 directly from the DJI website. The latest version of both also enables the onboard RID transmitting and seem to work well.