Tripltek is good for compatibility; should work with everything. CS, not.
My Tripltek 9 Pro is still pretty awesome but introducing the Tripltek X Pro: https://www.tripltek.com/tripltekx
I also believe all DJI products have a full DJI warranty to be free of defects and workmanship; however, the process for making a warranty claim is going to be difficult for the US buyers. If you bought your drone from South Korea then you will...
I've talked about the government keeping lists quite a bit and unfortunately as long as DJI is on "the [covered] list" I think things cannot be considered normal. As far as I know, there is no way to get off that list just like there is no way...