Scenario 1 - A Google Pixel 7 Pro with factory firmware signed into a Google account. In the Google account under device activity, the device will be listed as "Google Pixel 7 Pro"
Scenario 2 - A Google Pixel 7 Pro with GrapheneOS firmware using Sandboxed Google Play signed into a Google account. In the Google account under device activity, the device will be listed as "Pixel 7 Pro"
"Google Pixel 7 Pro" versus "Pixel 7 Pro" is a metric that could be used to identify accounts with devices signed in that are not using factory firmware.