If there is a total schism in the Orthodox Church the list of those who attended vs. those who did not attend the Council of Crete may serve as a preview:
Churches that attended
Church of Constantinople (Ecumenical Patriarchate)
Church of Alexandria
Church of Jerusalem
Church of Serbia
Church of Romania
Church of Cyprus
Church of Greece
Church of Poland
Church of Albania
Church of Czech Lands and Slovakia
Churches that did not attend
Church of Antioch
The Antiochian Church pulled out due to the dispute over the ecclesiastical jurisdiction of Qatar that is also claimed by the Patriarchate of Jerusalem.[31]
Church of Georgia
The Georgian Orthodox Church pulled out due to disagreements about several of the Synod’s documents, in particular “The Relation of the Orthodox Church with the Rest of the Christian World”.[
Orthodox Church in America
The Orthodox Church in America (OCA) was not invited due to the lack of recognition of her autocephaly by other autocephalous Churches.
Russian Church
The Russian Orthodox Church pulled out because of her belief that the council is not truly “pan-orthodox” without the Antiochan, Bulgarian, or Georgian churches.
Church of Bulgaria
The Bulgarian Orthodox Church pulled out due to disagreements on some of the texts already approved for the Synod meeting, and specifically that those texts would not be subject to editing in the course of discussions.
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The true wild card is the OCA, not embraced by either the EP or MP. It may emerge as the “bridge church” or as totally isolated and without canonical standing.
The OCA has already called for an urgent pan-Orthodox synaxis to address the Ukrainian situation.
The Serbian Church was forced to attend the Council, and it disowned many of its conclusions!
Churches that recognize th OCAs autocephaly:
Recognition of autocephaly:
Currently, the Russian, Bulgarian, Georgian, Polish, Serbian, and Czech and Slovak churches recognize the autocephaly of the OCA, though the Bulgarian, Russian, and Serbian patriarchates continue to maintain parishes inside the OCA’s claimed jurisdiction.
Among the churches that do not recognize it is the Ecumenical Patriarchate of Constantinople, which argues that the Russian Church did not have the authority to grant autocephaly, partly because the Russian Church at the time was considered to be heavily influenced by the Soviet government. The Ecumenical Patriarch also cites Canon 28 of the Council of Chalcedon, which asserted the jurisdiction of the bishop of Constantinople in dioceses located “among the barbarians” (i.e. outside the Roman Empire), as the source of the Ecumenical Patriarchate’s authority in the matter.
Apologists for the OCA’s autocephaly claim that the decree did not need the approval of the Ecumenical Patriarchate, as it was an internal matter for the Russian Orthodox Church to decide. Many autocephalous churches, the Russian Church included, were not recognized as such for many years, albeit their autocephaly was granted by the Ecumenical Patriarchate.
https://en.wikipedia.org/wiki/Orthodox_Church_in_America#Recognition_of_autocephaly