The Teams Presence API is now available (at least in Beta). https://graph.microsoft.com/beta/users/{ad_user_guid}/presence

Allow (by configuration option) the bi-directional flow of presence status between the Omni Channel Hub user persona and their Teams Persona. Ideally Teams should also get a new presence status which reflects "contactable if necessary but focussing on First Line activities" i.e. a sort of soft do not disturb unless really necessary status. The Omni Channel "busy but has spare capacity" status would map to that status in Teams.