As far as I know, Events Team does not use Phabricator. Also see "Recent Activity" on https://phabricator.wikimedia.org/project/profile/3988/ and https://phabricator.wikimedia.org/project/profile/4045/ .
I want to avoid that people who add #Events-Team to a task and expect the WMF Events Team to reply if that might not be the case.
Should Events Team and International-Developer-Events be archived and its open tasks (if you consider them all under ownership of the Events team; if not a different team should probably be added instead) closed (see https://phabricator.wikimedia.org/maniphest/query/3kaQYNxRXwOx/#R ; though not sure if and where you'd want to migrate valid ones), and the project description updated to explain how to contact the WMF Events Team?
I could not find a ticket where creation of these projects was requested; T219608: Move #International-Developer-Events under #Events_Team is the only trace.