I guess we're going to let AT&T, Verizon and everyone else just squat the entire spectrum. "5G" and the pillaging and theft of spectrum that seems to just sit idle anyways has been such a scam. If they wanted innovation there should be more ISM bands and less dependence being encouraged on wireless providers for "Internet access" as opposed to just biting the bullet and running more fiber and copper. But that would be bad for Verizon, T-Mobile and AT&T's bottom line so obviously we can't do that.

How would that work… will they have to force manufacturers to recall or issue mandatory updates to routers which already support it?

FCC enforcement for interference can work for occasional troublemakers but there’s no way they can go after every single consumer who (most likely not even realizing it) bought a 6Ghz-capable router that is encroaching on the now-privatized frequency band.

Germany also wants to sell the 6Ghz frequencies to MNOs