For anyone else struggling to get WiFi working on the Interceptor board, here's what worked for me:
Some of these steps may be unnecessary, I wish I took better notes while I worked on this and could spare you some potentially unneeded steps, but this should work. From a clean install of the Interceptor OS, plug in an ethernet cable to download the packages needed to get WiFi to work.
sudo apt update -y
sudo apt upgrade -y
sudo apt install nano -y
sudo apt install network-manager -y
sudo apt install raspi-config
Go ahead and take this opportunity to install anything else that you like to use to navigate Linux.
With those packages installed, run the following commands:
sudo systemctl stop networkd-systemd
sudo systemctl disable networkd-systemd
sudo systemctl enable NetworkManager
A reboot would be prudent at this point.
Once up and running again, run:
Use the interface that pops up to connect to your preferred WiFi network. YMMV, but I had to also disable IPV6. You can do that from the nmtui interface. For reasons as of yet unknown, in my case, the WiFi doesn't seem to work when an ethernet cable is plugged into port A. Remove it and reboot. WiFi should work at this point.
I also used sudo rasp-config between attempts. I don't think it's required, but if the steps above don't work, give it a try.