I found a solution that worked for me! From this topic which I can’t directly link to (perhaps you can search) hailo-8-c-processor-not-detected-by-hailortcli-etc-when-on-a-geekworm-pcie-switch-for-rpi5 which linked to issue 6206 on raspberry linux’s GitHub,
The suggestion was to add a device tree overlay to the config:
dtoverlay=pciex1-compat-pi5,no-mip
In my case, I was running HassOS so I needed to take the SD card to a different machine, mount the volume, and I could edit the config.txt which in that case was at the root of the mounted folder (I’ve also seen /boot/config.txt referenced and in another raspberry pi os it was /boot/firmware/config.txt). There are lots of lines in that file and I just needed to add the above to that file.
Good luck