I mentioned this in the other thread, but its technically more on-topic here. I have a Mavic 4 Pro (original 01.00.0300 - have not updated to the new firmware that appears to share the same version #) + RC 2 (Fly v1.18.2) and it does broadcast...
I have an RC 2 but am unable to find any setting to turn off GPS.
I have also not installed the update originally mentioned, but can confirm that Mav4Pro (original 01.00.0300) + RC 2 (Fly v1.18.2) broadcasts pilot location via remote ID as picked...