Google has removed the option for Pixel 5 and Pixel 4a 5G owners to use the astrophotography feature with the phones’ ultra-wide camera.

The feature, which is an advanced night mode offering designed to help users capture images of the stars, first debuted on the Pixel 4. When the late 2020 devices were announced their ultra-wide camera also gained the capability.
…
Continue here:
https://www.trustedreviews.com/news/google-removes-a-neat-camera-feature-from-pixel-phones-but-why-4115470