Maybe they are referring to the “COVID-19 Exposure Notifications” setting. Im using a Pixel too, and you can see the toggle if you go to Settings, then select

Maybe they are referring to the “COVID-19 Exposure Notifications” setting. Im using a Pixel too, and you can see the toggle if you go to Settings, then select Google. Mine is toggled off, and I don’t really know he details of how it works, but it seems like you need to download some official COVID reporting app to enable it.