My understanding is that it’s only the US that now allows for full-power 5G transmitters near major airports.
And it’s not “fake news” at all. It is a fact that 5G operates on frequencies very close to that of radar altimeters, and it is just physics that transmitters don’t transmit only on the desired frequencies. There are frequency spill-overs that occur, and older radalts that were built with the then-true assumption that there were no adjacent frequencies in use very much could experience interference issues.