Intel AX200 Drivers Ubuntu

# run this to determine which firmware the kernal is looking for
modinfo iwlwifi | grep iwlwifi-cc

# example output:
# firmware:       iwlwifi-cc-a0-50.ucode

# go https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/ and download the firmware

# copy file to /lib/firmware
sudo cp ~/Download/iwlwifi-cc-a0-50.ucode /lib/firmware

# reboot
sudo reboot

# check that firmware was loaded
sudo dmesg | grep iwlwifi | grep version

# example output
# [    4.566709] iwlwifi 0000:05:00.0: loaded firmware version 50.3e391d3e.0 op_mode iwlmvm

I want to add my case on this issue, maybe it helps somebody in the future.

So I have dual boot Ubuntu 20.04 and Windows. Have been switching from one to another without any problem for several weeks (or maybe just that I don't know the issue exist, since usually I used LAN cable rather than wifi).

So one day after booting win10, I boot to ubuntu to notice that the wifi is missing and the wifi tab on setting are also dissapeared.
Panicked, I boot back into win10 for a hardware sanity check to find out that wifi on win10 work perfectly (so not a hardware issue, right?).
But then I restart the pc and back to ubuntu, the wifi is still missing!

I used dual boot so long that I'm aware to ALWAYS turn of the Fast Startup in BIOS, so at my case, the Fast Startup option is already turned off since first installed this dual boot system. Honestly at first I'm not sure with the @zinwalin and @jason-shen solution.

After reading this page, I give it a go. Restart to win10 until the desktop shows, then restart back to ubuntu. Bam! The wifi works again lol.

I didn't do anything related to the kernel/module/etc. No terminal command issued. Just restart.

Still wondering why this works. But I'm happy now!