Seeed Studio XIAO ESP32C6

I am trying to utilise a Seeed Studio XIAO ESP32C6 to report voltage within the SmartThings ecosystem. Unfortunately, I can’t even get the thing to connect!

It connects easily to a “dummy” Home Assistant setup running on a Raspberry Pi but isn’t recognised by the SmartThings Hub (V2) using any of the Example sketches I have tried.

Has anyone managed to use one of these boards successfully with a SmartThings Hub?