Google has added a whole bunch of cool features to Android 12 that’s currently in beta and should be rolling out officially soon. One of them is the power to pull up the Google Assistant by long-pressing the power button.
Additionally, the Google Assistant is gaining the power to turn off your phone following your voice command. This has been spotted by 9to5Google when they decompiled the latest version as a part of their APK Insight series. But as is the case with APK files, some of the features spotted on decompilation may or may not turn up in the final version when it rolls out, that remains to be seen.