https://wccftech.com/google-is-working-on-the-fix-for-pixel-6-pro-display-flickering-issue/

As people have finally started to receive their Google Pixel 6 Pro devices, some users have started noticing a flickering display issue when the phone is powered off. Thankfully, Google has acknowledged the issue and stated that the fix is coming with the new update.

Although the issue is only in some devices, Pixel 6 Pro users notice that holding down the power button partially when the device is entirely off, horizontal strips of lights appear on the screen.