This is due to the anti-china and tariff thing. It could take a long time for them to get over their latest tantrum. It might old model before it's returned. We're not under the normal rules anymore, it's an authoritarian government now.
So what will change the longer they hold it? Will the drone transform itself somehow to become legal? Semantic difference: you are still separated from your property and livelihood.
What the heck are you talking about? It's a replacement drone for the one he sent to dji for repair. It was shipped from dji to him and is his drone. If they send another one it will be confiscated as well. It's much to do about nothing unless...
You can thank current administration and congress for this one. It's all part of the ongoing China bashing campaign. I certainly hope you get your equipment back, but it doesn't sound good.
My M2Z is updated to the latest firmware with RID and works fine. I also use the Smart Controller and needed to install the latest version of GO4 and reboot both for everything to work properly. So I would think whatever phone or display you use...