You are using staging server - a separate instance of the ESP Component Registry that allows you to try distribution tools and processes without affecting the real registry.
This component provides prebuilt [opencv-mobile](https://github.com/nihui/opencv-mobile) library with newlib. Supported targets: esp32, esp32c2, esp32c3, esp32c5, esp32c6, esp32p4, esp32s2, esp32s3
idf.py add-dependency "100312dog/opencv-mobile-prebuilt-newlib^0.2.0"