Little late to the show but thought I share my own findings regarding this topic. I own a Korea purchased M4P and was wondering about RID functionality myself, making sure I am compliant flying it here in US. I did my own research on this topic...
I purchased from K-Wave at the end of July. Then and now, there is no language in their description that mentions that the M4P will only operate in CE mode.
One more thing to note is that the DJI RID, if your drone is so equipped, is the same as your drone's serial number. You can find the serial number on the M4 Pro within the top front edge of the battery compartment next to a QR code that is not...