Boeing and Airbus (and others) buy radar altimeters from the same vendors. It just happens that Boeing finished checking out a bunch of configurations that the

Boeing and Airbus (and others) buy radar altimeters from the same vendors. It just happens that Boeing finished checking out a bunch of configurations that they have sold in the past against interference from 5G under FCC allocation (AFAIK they previously checked against setups allowed in other countries), and published results. Airbus and others are also performing extra tests now.