Graphene-FTP-613 If you really believe this, then you can do a factory reset from recovery following these instructions: https://support.google.com/pixelphone/answer/4596836?hl=en#zippy=%2Cwith-your-phones-buttons-advanced
Just follow the section entitled "With your phones buttons (advanced)". This kind of factory reset can't be faked. After resetting, you can use Auditor to make sure everything checks out, and you may also consider setting up scheduled remote attestation.