You can get a clip on ferrite ring that’ll possibly help with the radio, it just clips onto the power cable. If you have the box for the camera check in there as they’re often supplied loose in the box. I had a transit connect which I hardwired with the wires routed passenger side, DAB stopped working and the FM was weaker than usual. It does seem more common to have issues with DAB rather than FM. I rerouted the wires to the drivers side and all was fine. I have solved the issue on other vehicles with the ferrite ring so worth trying that first as they’re cheap. I normally put them as close to the camera as possibly but still behind the headlining, some people do put one each end though.