I am trying to use a live ISO of Ubuntu 23.04 on a laptop that requires proprietary WiFi drivers. My networking card is detected correctly in Software Center and I am able to enable the proprietary drivers, but I still don't have any WiFi networks showing up in my network settings. Normally, you have to reboot after installing the proprietary drivers in order for the desktop environment to detect them, but I cannot do this because I am in a live environment.
Is it possible to use nonfree WiFi drivers in a live environment? E.g. is there a systemd command I can use to prompt the system to rescan for WiFi hardware?