@themc 

Hi,

The TX20U Plus uses a RTL8832AU chip. Try this driver instead: https://github.com/lwfinger/rtl8852au

  @woozle I copied the wrong repostory link and have tried the correct driver  already - https://github.com/lwfinger/rtl8852au so its not that

  @themc 

Did you notice any significant error messages during the installation of the driver?

I see there are three USB IDs listed for TP-Link inside the driver's source code. https://github.com/lwfinger/rtl8852au/blob/dwa-x1850/os_dep/linux/usb_intf.c

2357:013f, 2357:0140 and 2357:0141. Is the ID of your particular adapter one of those? (find out by executing the "lsusb" command)

I've been using a RTL8832AU adapter that has the generic USB ID 0bda:8832 and the driver from lwfinger has been working fine for me in Linux Mint with kernels 5.15 up to 6.5.

  @themc 

Do you see the AX1800 adapter shown with the "nmcli" command?

You mentioned you are on Linux Mint with up to date kernel. Do you mean the latest kernel offered by Linux Mint itself or have you installed a mainline kernel? I've had problems before when trying to use a mainline kernel.

  @themc 

If the TX20U Plus adapter is shown by nmcli, then the driver should be installed okay.

Does your TX20U Plus show up similar to my Realtek adapter in the screenshot below?

If yes, then what error do you get if you execute the command "nmcli device wifi list ifname actual_name_of_the_interface" ?

(for my adapter the command would look like "nmcli device wifi list ifname wlxe84e0697663b")

In case you don't get an error, but instead you do get shown the list of nearby Wi-Fi networks, then what happens if you enter the command

"nmcli device wifi connect actual_name_of_your_wifi_network password your_actual_wifi_password ifname actual_name_of_the_interface" ?

By the way, you can get information about your current kernel version by entering the command "uname -rv".

  @themc 

Sorry I didn't specially mark it in the screenshot, but the only important part of the nmcli output is this:

If you don't see something similar that also has the "rtl8852au" in it, then it means the driver from https://github.com/lwfinger/rtl8852au isn't installed properly.