I tried myself with the v2 dongle inside the Mavic 4 pro. RC2 4G is working with Mavic 4 pro, but for now you need to downgrade the drone fw - from 0100 to 0000.
I have tried it with RC pro 2 and so far no luck. I didnt find a way to rollback one...
I just joke, you are right. Very weird that we cannot rotate the antennas. But DJI should have a golden reason for it, otherwise i actually not understand this change