Exactly. If DoH included a change or extension to DHCP or could leverage an existing feature of DHCP, then this could be solved for corporate use. I would imagine something like the Proxy PAC "option wpad-url" using a different code to signify DoH. Even then, only browsers would be addressed by wpad. There would still need to be a mechanism to set DoH for non browsers.

We would also need all OS providers to get in front of this and have a package that supports internal DoH easily. i.e. AD snap-in for windows AD controllers. Perhaps an extension to sssd and/or Unbound and/or dhcp for Linux. That needs to happen before all the browsers start supporting this.

Certainly could. My assumption would be that the client implementation would have a way to exclude specific domains.