You seem to have a lot of trouble with your wifi, I have seen a couple of your threads about wifi now.
Using a wifi card that does not work after boot means it is most likely proprietary garbage and not implemented in the kernel. It’s irritating for sure (recently had some wifi driver hate experience), but in the long run it may not be worth trying workarounds that may break later. My recommendation is to buy a pci wifi, costs about 30 bucks and make sure it is supported in Linux…
The above link says that you need to install a driver from the AUR using yay. Meaning you need an Ethernet connection anyways to install the driver.
If the package has any other dependencies and wants to pull some additional packages via git it’s going to be messy. Dealt with it before, what was supposed to take 5min took 2 hours and was still not working. This could turn into a 100 post thread without fix.
However someone can guide you through how to install packages downloaded offline. Don’t mean to discourage you. Speaking from own experience I would go pci…
That is not the issue I can go “hard way” if it is really needed.
I’m just not sure I should go this rabbithole downloading manually packages etc if in the end all that stuff needs restart to start working…
But looking at your package it will try to pull from GitHub, without internet not possible I think unless you clone manually from another computer and change the build package. Good luck! Think about my words pci supported by Linux and avoid the frustration
Put the package you want to install in live session on another USB drive.
In live session open the file manager and go to where you saved the package earlier.
Open a terminal there and run sudo pacman -U X ## where X is the name of the package.
Another option would be to USB-tether your mobile phone and see if you can get online that way. If you can then you can do an online install.
The one in title - TP-Link Archer T2U Plus. It is USB WiFi adapter.
[elnath@elnathPC ~]$ lsusb
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 002: ID 2357:0120 TP-Link Archer T2U PLUS [RTL8821AU]
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 004: ID 0b05:1939 ASUSTek Computer, Inc. AURA LED Controller
Bus 001 Device 003: ID 046d:c332 Logitech, Inc. G502 Proteus Spectrum Optical Mouse
Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub