Not sure if UVC cameras are suitable for allsky ? Just a webcam with limited exposure time ? Maybe someone else had some luck,
I also tried an arducam IMX462. Again this is a proper libcamera device using pi csi cable.
You also need to flash the camera firmware to get long exposures .
forum.arducam.com/t/imx462-libcmaera-sti...n-doesnt-work/3193/4
Download the file imx462_lanes2_firmware_long_exp.tar.gz from the Google drive in the link and untar (tar zxvf imx462_lanes2_firmware_long_exp.tar.gz)
The README says it runs on jetson nano but I ran it on pi3 raspberry pi 32bit os fine (doesn't work on 64bit os).
Flash at own risk !
This extends the exposure from 2secs to 15 seconds and increases the gain limits.
It is a very sensitive IR capable camera so 15secs is way over the top.
3x5second images stacked using imagemagick convert -average command which improves the quality.
Images taken from inside house, full moon, reflections from window glass,