Wifi controls seem to have disappeared!

Core Machine (Operating system/System info/Roon build number)

MacOS 11.2.3 / Roon 1.8

Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)

WiFi from TalkTalk router. Dual band.

Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.)

Cambridge Audio DacMagic 200M via USB

Description Of Issue
I’ve been attempting to set up the RaspberryPi to use the internal wifi to connect to the network. I’ve set up the network and password but it still doesn’t connect directly.

When I go back into the UI and go to the Network page all I see is “Wired” and “Wireless” but if I click on Wireless this is all that appears:

Any obvious flaws?

If I attach the RaspberryPi via ethernet to an old Airport Express (which is also how I got back to the UI) it works fine, just not on its own internal WiFi.

When you select the radio button to enable WiFi do you get this?:

All I get is what’s shown. It went through the enabling hardware process during set-up.

It happily showed that it was setting up the Raspberry Pi wifi and found the network and allowed me to put in the password. But once rebooted it disappeared off the network unless attached to the Airport Express.