This is ridiculous. I have had three Apple TVs sitting on my desk for over 3 weeks now. I can't deploy them because I can't enroll them in ABM. Configurator for macOS is the only method Apple provides to enroll Apple TV devices in ABM, so even though iOS Configurator works fine, it can't be used for enrolling these.
You'd think the fact that this is first-party software intended for business/enterprise customers that they would make fixing it a top priority. Even better would have been taking greater pains not to break it in the first place.