Android 12 has arrived, but not for Pixel smartphones. Instead, Google has only pushed its new OS to AOSP. Android 12 will arrive on existing Pixel devices later this month, potentially around the time that Google launches the Pixel 6 and Pixel 6 Pro.
https://www.notebookcheck.net/Google-releases-Android-12-to-AOSP-Pixel-smartphones-to-receive-new-OS-in-the-next-few-weeks.569391.0.html