Anyone thought about the Alientech antenna for the SC, I cant see a full kit but I would think you buy this for the SC and an antenna of your choice from their site.
ALIENTECH PRO Case & Cable Kit of DJI Mavic 2 Smart Controller for Signal booster Range extender
After replacing the cover of the Smart Smart Controller, you can obtain the function of extending the signal to the remote controller, and replace the antenna with higher gain or Signal booster and Range extender.
alienth.cn