The FCC is now a case of a Aged Gutless decrepit chicken guarded by a den of WolvesThe guard bands are twice as large for the CE standards than the FCC allowed for 5G here. The CE standard used the EASA testing to show that power levels at the frequencies nearer the guard bands needed to be lowered and the antennae needed to be angled downward more to provide full compatibility with existing nav equipment.
The FAA knew this. The FCC knew this. Neither coordinated a solution for the US.
The claims that "5G is working in Europe just fine, and isn't a problem in he US" is willful ignorance. The differences are there, and may or may not be meaningful. It's the job of the FAA to be well ahead of these things. They failed. It's the job of the FCC to follow its own rules on guard bands. They failed.
The CE and EASA will replace the FCC and FAA as the leading international promulgating body for rational, effective regulatory frameworks and standards moving forward. The FCC and FAA fell behind decades ago, and the world is kind of fed up with waiting for them to sober up.