Does internet work? You can check by running “ping archlinux.org” in a terminal, (Ctrl C to stop it). If you are connected to internet you could search for packages using the “pacman -Ss <e. g. chromium>”, and or install by using “sudo pacman -S <name>”
It’s possible you may be specifying the wrong device? Try iwctl, and then “device list” to see other options. I always seem to have two or three, with only one working. More info here: https://wiki.archlinux.org/title/Iwd#iwctl