I upgraded the AX200 in my HP EliteBook 855 G7 to an AX210. After swapping the chip and trying drivers from both HP and Intel, I'm still unable to connect to the 6GHz signal from my Netgear RAXE500 router. Our phones are able to see and connect to the 6GHz network, but not this HP laptop. My next step is to try a Ubuntu live thumb drive of some kind to see if it can see the 6GHz network. I purchased the AX210 from CDW so I'm confident it's genuine.
In the RAXE500 settings, my region is set to North America.