de0u How is it known that the device is a genuine Pixel 6 Pro?
ans it was a geniune pixel running stock pixel os.
In the past there have been some fairly convincing fakes of expensive phones, such as iPhones, which is why I asked how it is known that the device is genuine. For example, if the device is able to install and run certain banking apps that require Play Integrity attestation to pass, that would increase the likelihood of it being a genuine Pixel device.
ans The problem is that it did not show a warning that boot integerity is compromised.
If somebody has figured out a way to change the IMEI number stored in a Pixel's flash storage, that by itself would not compromise boot integrity. The IMEI is just a number. In the past it was possible to change IMEI values for older Pixel devices using a Qualcomm technician service tool.