Not quite.
North American jurisdictional unity was not broken by the Bolshevik Revolution. The Church here remained united under Russian hierarchs under the terms of St. Tikhon's ukase of 1920 until 1922 when the Ecumenical Patriarch Meletius (of sorrowful memory) claimed jurisdiction over the 'Greek diaspora' in the wake of the Second Greco-Turkish War, and established the Greek Archdiocese.
It is unclear how the Synod/Metropolia split would have played out, or even if it would have happened, had the entire Orthodox world continued to recognize North America as united the Russian hierarchy which had evangelized the continent.
"North American jurisdictional unity was not broken by the Bolshevik Revolution. The Church here remained united under Russian hierarchs under the terms of St. Tikhon's ukase of 1920 until 1922 when the Ecumenical Patriarch Meletius (of sorrowful memory) claimed jurisdiction over the 'Greek diaspora' in the wake of the Second Greco-Turkish War, and established the Greek Archdiocese."
Not quite once again. Greek Orthodoxy in this country from 1908 to 1922 was under the Archbishop of Athens. When +Meletios was elected EP, he created the Greek Orthodox Archdiocese here as a Eparchy of Constantinople. Prior to 1908 I think its fair to say that the Greeks were under the Russian Bishops, though Constantinople says otherwise. The Arabs were a sort of separate entity as a mission of the Russian Church until the 1970s, though the period from 1918 to then was a confused on to say the least.
But the reason this could happen was the Russian Revolution and its devatation of the Russian Church.