Unfortunately, because the King Air 350i is equipped with a G3X, you will not have access to the WX radar. Your best bet is to install the PMS GTN750 Mod which replaces the G3X MFD with a Garmin 750. There you at least have access to NEXRAD, which isn’t the same as having a weather radar.
Since this isn’t a bug, but an actual limitation based upon Asobo’s decision to use the G3X in lieu of more likely FMS such as the ProLine 21, this post is being moved to #self-service:aircraft-systems.
Sorry if this is not the site, but let’s talk about the KING AIR 350i - Textron Aviation
Why does it seem to be the last in line, or is it not planned to do anything to this wonderful plane?
Someone in a forum that is already closed in 2021 said that the King 350I does not come from the factory with a weather radar, well, it not only comes with the radar but it is also a standard within its aircraft sales items.
more information here: