I've been told by someone of prominence in the Eastern Orthodox Christian Church, who supports full unity with the so called Oriental Orthodox Church's, that the dialogue facilitated by the Ecumenical Patriarchate, in conjunction with all the Holy Orthodox Churches, begun in the 1960's, concluded its work. This work has been published long ago. I had received a gratuitous copy from the Holy Cross (School of Theology) Press, Brookline, MA, some years ago. I think it is now out of print.
This source told me, with the conclusion of the dialogue, all that remains is for the Church (EO) to acknowledge that unification has been achieved. He indicated Patriarch Bartholomew supports this unification, but that too many, throughout the Holy Orthodox Churches, remain opposed to it. Not-with-standing the reasons for it, many deemed legitimate by those on the EO side, I think the problem that remains is that the Oriental Orthodox Church's have not accepted, en to-to, the doctrines defined by all of the Ecumenical Synods (Councils).
SCOBA cannot act on this matter because it has been handled by representatives of the Holy Orthodox Churches; a pan-Orthodox Commission.