Thanks @clockfort
It's really good to know you can see the USB on Armbian.
I was aware that you have to run inference before seeing the proper device in lsusb but I can't even see Global Unichip Corp.
I hit bootloader issues when I flashed Armbian and my Orange Pi was dropping into initramfs. I since fixed the partitions and flashed Ubuntu XFCE (from the official Orange PI website) onto my orange Pi. And have been stuck ever since - I've even got frigate running in docker with mqtt and am back to the same old problem about tpu delegates.
After your reply, I'm going to flash the Armbian image onto a SD card and boot from that to see if I can see the USB.
Can I ask, did you install the edge tpu runtime (libedgetpu...) before being able to see the Coral USB device?