I followed the steps in
https://docs.arducam.com/Raspberry-Pi-Camera/Native-camera/Quick-Start-Guide/
with a brand new and updated installation of Pi OS 64bit (Bullsey) and the 16MP AutoFocus Camera.
It says to
Step 4. Install Camera drivers
…
Step5. libcamera-apps
Preview 5 seconds.
libcamera-still -t 5000
When I just follow the steps then in step 5, I get an error about “no camera detected”.
A reboot fixed it.
Maybe add that as another step to the page?