This is something which I missed.
St Luke’s Ordinariate Community in Washington, D.C. posted on their facebook page on March 29 that:
During the (Palm Sunday) Mass, Monsignor Steenson announced that our Pastor, Father Mark Lewis, has been appointed by him as Dean (Vicar Forane) of the Eastern Deanery of the Personal Ordinariate of the Chair of Saint Peter.
This is interesting news, which would seem to suggest that the Ordinariate of the Chair of Saint Peter no longer has only one Deanery, namely in Canada, but that the territory of the United States has also been divided into Deaneries.
Congratulations are due to Fr. Lewis and to those of his confreres who have also been appointed Dean.