Pi 5(Bookworm OS) compatibility with Arducam camera

That’s true.
We currently do not have support for the IMX519 camera driver on Bookworm OS. However, if you manually enable the camera by adding dtoverlay=imx519 under [all] in the config file, you will be able to see a preview window. Please note that autofocus functionality is not available at this time. We are actively working on making the IMX519 PDAF compatibility available on Bookworm, and we expect to release it by the end of this week or next week. Please stay tuned to this thread for further updates on the progress.