CF-31 - can I upgrade to M.2 Intel AX200NGW Wireless Card, Wi-Fi 6 11AX WiFi Module?

I don't think it will work, my CF-20 is newer and it wasn't compatible with AX200(did not appear in bios).

 

Good to know, did it sow up in the OS?

 

I do not have the card anymore so i cannot confirm, it seems that there is some kind of whitelist built in these computers.

 

That's correct. There is a white list. In newer models it is a little bit more complicated to fix the BIOS but it works. I modded the FZ-G1 and CF-31 and added the AX200 and I can see both the WiFi and Bluetooth in the BIOS and also in Linux. You will need to dump the BIOS extract the modules and search for the old strings and replace them with the new ones from your AX200.