FAA bars three Boeing models from landing at airports with 5G interference

Anyone know the difference between the Airbus A350-900 and B-747-8 radio altimeters? Do both aircraft utilize the signals for auto throttle, Pre-flare, EGPWS, Tcas etc. Interesting that the old A-300 is not affected when you think it was before 1g let alone 5th gen. Like to see test results.