I replaced my M.2 wifi card with a new Intel AX210.

Very good upgrade!

I now have WiFi6 and Bluetooth 5.2

You should probably go ahead and order new IPEX 4 MHF4 Antenna 2.4GHz 5GHz 3dBi Internal Laptop WiFi Antenna for M.2. - just so you have them. To replace the antennas, there are 4 screws at the bottom of the screen (hidden behind plastic covers). Once you get those screws out you will be able to pop the bezel off starting at the left and right sides on the top. After you get the bezel off, disconnect the camera module then unscrew the lcd mounts and fold the lcd away from the shell so that you can run the new antenna. Mind how they routed and taped the old antenna wires and do the same with the new antenna.