Here, most news orgs have a bureaucratic mess to allow their journalists to use their newsroom domain name, so do you just use domain name ?

An org has to have enough of a presence here that it's willing to add a single TXT record to its domain. I am more than willing to walk any orgs through how to do this (hmu on Discord @aendra), but this also ensures the account has enough org buy-in that they might actually post content here.