It looks like there might be an issue with the latest Android 14 QPR3 Beta 2 release. According to 9to5Google and some other users on Reddit, sideloading the newest update is soft-bricking Pixel devices.
The publication reports that while sideloading for QPR3 Beta 2 works typically, any attempts to restart Pixels once the process is complete results in the device being stuck on the Google logo.