Just installed a new AX210ngw card into my old 2014 Samsung laptop.
Not without a little difficulty: first, the wifi wasn't recognised, nor the bluetooth!
The wifi issue was easy to correct: as I don't have an ax network, I simply selected ac in the driver, and that cured the issue (shouldn't that be automatic?)
I tried quite a few things with Bluetooth (5.2), including switching back from Win 11 to Win 10, and back again.... with the latest Intel Bluetooth drivers.
Eventually found a review that referenced a "pin 2 mod" - but wasn't sure which pin was pin2..... It mentioned a YouTube video from the Green Electric Channel.
That referenced "2 pins" on the back of the card.
Sure enough, my old card (7260n + BT4) had 4 pins in a row (in the centre), while the AX210 had 6 pins in a row.
Taping off the 'extra pins', meant it was compatible with the older m.2 slot, and Bluetooth 5.2 suddenly burst into life.
(shouldn't backwards compatibility be automatic?)
Not very impressed: compatibility should be auto-sensed and the pins disabled.