You have a least the ip, wpa_supplicant, dhcpcd program installed on the ISO. You should get a connection with this basic tool even with a WIFI device if the kernel recognize your network device.
For the rest you can follow the Achlinux wiki about network configuration. The only difference is the way to deal with state of the services.(
https://wiki.archlinux.org/title/Wpa_supplicant)