Rock5b camera dtb missing

Hello, I’m following: https://wiki.radxa.com/Rock5/accessories/radxa-camera-4k
after run update_extlinux.sh and reboot board won’t boot. I plan to manually add dtb but seems it’s camera dtb is missing in /boot/dtbs:
ls -la /boot/dtbs/5.10.66-27-rockchip-gea60d388902d/rockchip/ | grep rock-5ab-camera-imx415

I’m using latest debian.

Thanks