Those frequencies are only currently available for ROW use (rest of world). In the USA/FCC-land, 5.9 is available, but you need FCC authorization and a custom “STA” firmware to unlock it. Frequencies beyond 5.9, up to 6180 are not allowed yet in the USA because the Automated Frequency Coordination (AFC) is not in place yet. Please see THIS thread discussing USA and Canadian use of the new 6GHz band.
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