ChromeOS setup instructions missing an option

The setup instructions for ChromeOS fail to mention that there is an OS wide setting for secure DNS where a NextDNS server name can be entered. This seems to be a system wide thing, much like Android. That is, it seems to apply to all Google accounts on the ChromeOS device and to Guest Mode too. 

I could not tell if it over-rode a VPN or not as the results from assorted tests we contradictory.