As explained at Discourse#One_place_to_seek_developer_support, Project:Support desk has been until now the only channel whose main purpose is to offer support for developers and other technical contributors. As maintainers of the Support desk, you are invited to check the new Wikimedia Developer Support test pilot. Your feedback will be key to decide the next steps of this pilot and its relationship with Support desk.
While in Discourse (the software used in this new space) users get more permissions automatically as they make useful contributions to the project, I think that those of you maintaining the Support desk could be assigned directly the Moderator role there. If you are interested, create a new user in the Discourse instance and ping me.
Also, what would be the best way to proceed advertising Wikimedia Developer Support here at the Support desk? Reasonable options could go from not announce it (to avoid confusion to users landing here) to direct developers to invite developers to use the test pilot space instead (which would bring more traffic and therefore better conditions for a good test).