6ghz

Given this router is 2.4, 5 and 6GHz, can any or all of the antennas be upgraded? Only certain ones? I'm particularly looking for 6GHz downstairs and a room over, which is currently lacks. I reside in the US and don't want to break any laws. My understanding was always antennas needed to be...

Not sure if anyone noticed - Ted Cruz (R-Texas) added an amendment to Trump's Big Beautiful Bill that removes 800 MHz of public unlicensed spectrum to auction off to the Wireless Telecom carriers... Same goes for CBRS - which is the 3.5GHz band, which, perhaps is less important to some, but...